The Xbox One Project Scorpio will start at $399 for the entry model.
More powerful for the same price is just as good for marketing as having 4k blu-ray, while the competiton does not.
They won't drop that advantave.
However, the real price will be $499 for the general model. The one with a decent Harddrive size and a Game Bundled. Just like the Xbox360 startet at $399, but the most people wen't for the more expensive model in the early release days...