Please MS, bump Lockhart up to 6 or 7 tflops. 4 tflop will not be enough to hit 1440p with the same graphics settings as Anaconda hits at 4k if Anaconda is over 10 tflop. Even 1080p with the same graphics settings won't be possible with just 4 tflop. And if devs have to lower graphics settings as well as resolution to get a game to run on Lockhart, that makes porting harder for them and will hold back the graphics of games on Xbox next gen, because it is easier to scale up than it is to scale down.
If they hit 4.5tflops with the new architecture you could be looking at the X1X for GPU power and with better components for other parts it should be a decent machine if they can get it out there for $299 as a price point for next gen entry will be key to it.