When the first Tomb Raider came out, I was 14. I didn't get it because there was a hot chick on it, I got it because everyone and their brother made a big to-do about it being a 'revolution' in 3D action-adventure gaming. And, you know what? They were right. As graphics have improved, it has become a slightly more pleasant task, staring at Lara's ass as you spelunk and gun fight, but I'm not looking at her ass, I'm calculating jump distances, evaluating the amount of clearence I'll have if I dive between the two velociraptors coming straight at me.
The video gaming community has grown at such an exponential rate since the introduction of task games like WOW and console games that any knuckle-dragger can relate to (like HALO), the task of attempting to parse the demographic you, the video game company, intends to market to is astronomically difficult. Little variations can change the tone of a game entirely, and thus alter its target audience. Less than a papers' breadth seperates Uncharted and Tomb Raider, but that's all the difference it takes to polarize people.
Frankly, I've never found anything particularly wrong with Tomb Raider games (at least, nothing that stands out in sharp relief to any other video game, AAR), apart from what happens when you rush them out the door, so the need for a reboot of the franchise is beyond me. James Bond obviously needs it, since each reboot actually results in a good movie (Goldeneye: excellent, Tomorrow Never Dies: average, The World Is Not Enough: bad, Die Another Day: god awful; Casino Royale: good, Quantum of Solace: bad, etc). But, if a reimagining will bring more fans to the series, then good luck and godspeed, Eidos.
I'm not excited about the sandbox element, because in my personal experience, nothing hurls you out of the experience faster than introducing the bits and pieces necessary to make a sandbox game work (like giant glowing arrows that might as well read 'go here, stupid'). I hate it when I have to download a FAQ just to play the game correctly. I like linear. Linear is good, since that's what 95% of video games are anyways. You might given a scrap or tidbit that perpetuates the ILLUSION of an open world, but it's usually not the case. Most video games need linearity to make sense. Like most movies, books, or anything else with a story.
But whatever, if offering up an illusion is what it takes to get people to buy a game, then I'm all for it. It's clear I don't understand the average gamer (I discovered, after playing BioShock), so I'm not sure what to say, really.
I'll buy it, and play it, because it's a Tomb Raider game. One would assume that the game's makers will stay true to the parts that I actually like about the series, the action and adventure and puzzle-solving parts.