This has to be one of the most eyebrow raising "leaks" we have had so far.
For starters, no reason for a sensor bar. Even the Wii U regular edition didn't have one because it was already added to the gamepad.
The 900p resolution is also silly, MAYBE it makes sense if its the Handheld output, but for the main console it would be a step back compared to what Wii U can do (Who runs 1080p when needs to).
But at the end of the day it doesn't matter. If they nail a $250 price point with 3 powerful launch titles (3D Mario, Zelda and one niche nintendo franchise) the console is going to sell at least decently.
I mean it could be something closer to the Kinect/PSCamera but just marketed as a sensor bar for consistency. But you're right, it's weird.