Personally, the locking down of the platform to destroy the used game market is a big loss, imo. Being anti-friendly to indie developers is just another data point for sure; it's still not engendering excitement about the future of the XBox.
The newer Kinect seems real neat, although I do fear what it could be used for, (emotion tracking during tv ads?)
I think it's too early to speculate on "destroying the used game market" as MS has been very vague on the exact details. Not an issue for Steam for what it's worth.
Skype integration does seem cool, after moving away from home, it's nice to Skype with the family back home, and doing it on a TV seems more personal to me than an iPad or laptop.
The instant switching feature seems cool too, will have to see how it actually performs. Right now on my tv there is 2-3 second delay while switching inputs. Quite a first world problem, but cool that they are addressing it.
To me it didn't seem like PS4 brought much new to the table, while XO seems a bit more of an evolution of the last console.
e.g. Want to put your app.net snap-in out there so people can communicate that way during broadcast events? Sorry, Twitter doesn't want it. Maybe Facebook has enough money to buy its way in, but you're SOL.
Want to do an Amazon-style "X-Ray" companion app for video content? Sorry, Microsoft is rolling their own.
xmpp chat? Nope. It's Skype-or-nothing.
etc.