I agree with some of what the interviewees said, but I have a couple arguments against it.
I agree that chasing tech-inspired awe is starting to get old. Graphics are so good that it's hard to get any better. What's more real than photorealism? True 3D? We are starting to hit the limits of what we, as humans, can perceive (which is awesome!). At the same time, each leap is getting smaller: never again will we have a leap like moving from the 2.5D graphics of the SNES to the 3D graphics of the N64.
With the "wow" factor of tech innovations tapering off, customers are more interested in other things. The Wii wasn't a hit because of its graphics, but because it had an entirely new way to interact with the system. Maybe it became a gimmick, or maybe it didn't reach its real potential, but I was interested in it as a customer because it was something that hadn't been done before: it was the next big thing.
New game ideas are also a big thing. I jumped all over Braid when it first came out and I loved it. Guitar Hero took off when the franchise first started and Harmonix continued to gain customers when they introduced Rock Band.
Customers aren't necessarily looking for new, fancier graphics, they are just looking for something new. They want the biggest, the best, and the newest. They want something different than they had yesterday. If you can do that with better graphics, great, but you can also do it with new ideas of all kinds: stories, characters, gameplay, mechanics, you name it.
Along the same lines, I think the interest in old games has arisen because new games are starting to lose their innovative edge. Every now and then we get a fun new adventure, like Rock Band, Braid, or Fallout 3, but most of the time we get rehashes of the same game again and again: how many more Halo-like shooters do we need? How many soccer, golf, and hockey games? As each company attempts to perfect their IP and their recipe for success, the "wow" factor disappears because each game becomes that much more like the other.
But why does this make old games interesting? Because what's old is new again. Modern games are nothing like the old classics, and in comparison, the old ones seem new, interesting, and different. When you look at the complex graphics, video, and special effects that go into a modern game, it's hard to imagine that an old 8-bit game with sprites and square waves could be as engaging and gratifying as it was, but they are, proving that a game is more than just the technology that goes into it. The minimalist, often absurdist style that went into those old games stands in stark contrast to the realism of modern games, and this makes them appealing.
It can be hard to see past the bias of nostalgia, but it can also be hard to remember that these classic games are classics because they really were good games. They had interesting stories, characters, and gameplay, and these are elements that don't degrade over time. In fact, their primitive stylings make them attractive because they have become a reflection of a bygone era, the same way that watching an old black-and-white movie brings back some romanticism for a simpler time.
In all of this, I think we have lost something from that era. When technology was limited, developers had to make their games compelling in other ways. The stories, characters, and mechanics all had to be innovative in order to stand out from the rest. Sure, there were lots of games that were yet-another-platformer, but there were also a lot of games that were completely unlike anything before: Dig Dug, Lolo, Bomberman, Donkey Kong, Tetris, Qix, Pipe Dreams, Fire and Ice -- the list is long and the games are varied. In their refinement, modern games have started to converge on specific formulas that work, such as first-person shooters, real-time strategies, and role-playing games, and no longer branch out into entirely different genres (rhythm games being one of the major exceptions). Perhaps we have just discovered all of the genres and mechanics that are possible, but I think we have just stopped trying to find new ones because the current ones have been so successful from a business perspective. After all, the indie guys continue to come up with entirely new ideas.
Overall, there is nothing particularly wrong with new games: they are converging towards perfection in the genres and technologies that they have target for the last decade or more. But at the same time, this perfection has lead to a lack of differentiation between product lines, leaving customers wanting something new and different. And in comparison, old games sure look different, making what was old new again.