It all comes down to numbers. If the Wii sells, then Nintendo has to look at that as feedback and assume they're doing well. If sales tank, then we'll probably see a response. Right now, sales are high and Nintendo's casual market is going strong. Lots of games make tremendous use of the motion control tech, but for every one of those games like Boom Blocks or Warioware, there's 3 ports that had no business on the Wii.
Quantum of Solace is a great game, bit it can't be done justice on the Wii. That is not what that system is for. High-Definition Headshots are better suited to the 360. The Wii just takes a good game, downgrades the graphics and makes the controls frustrating.
Likewise, Star Wars the Force Unleashed may have benefited from the motion controls, but you're still better off playing it on the PS3.
As for Nintendo "abandoning core gamers", that's not really true. I know it feels that way, certainly I've been left out in the cold, but the truth is that Nintendo's market never changed.
Nintendo makes games for children. When you're a kid, Nintendo wins, hands down. I was about 8 years old when I got Starfox 64 and I thought it was the greatest game ever. If you were 15 when you got your hands on a NES, you probably still look back on it fondly. The trouble is, we grew up, and the games stayed the same. Nintendo is still targeting the same demographic, we're just not a part of it anymore. I think that's why Nintendo takes flak for "cashing in on nostaglia", because everyone always assumes a game is for them. It's not for us, it;s for our kids, our nieces and nephews, etc.