24 hour checkin (always-online DRM) and restricting game resale/trade is huge. The former has been adequately demonstrated by PR catastrophes like Sim City 2013 and Diablo 3, the latter is also very important to a lot of people who still buy discs.
We'll have to wait and see how this translates into sales, but Sony won a lot of points for not caving to publishers on these issues.
I suspect a lot of gamers also aren't keen on the Kinect, so the extra $100 for it is another downside.
Well, from a collector's perspective, the xbox one is a dead end.
Unless they make a very overt overture towards the end of the life of that console ...
In 15-20 years time, when the servers go down and the lights go out. It will be a useless piece of plastic.
Hell, in 15-20 years time even the non-collectors who hung onto their consoles will be screwed.
Unless the pirates manage to save it from obsolescence.