Bethesda is in the back pocket of Micrsoft. If you don't see that than you need to remove the blinders. Why do you think Oblivion was a release game for the XBox 360 when it first came out and why the next Bethesda game, most likely Fallout 4, will be a release game for the next Microsoft Console? Why do you think the game always runs better on the XBox than the PS3? Why do you think the game is designed for the XBox and then ported to the other systems? Let's not also forget that the new DLC will be XBox only to start with and come out later for the PC and PS3? Exclusivity anyone?
First, Oblivion was not a release title for the 360. It was intended to be (If my memory is correct, anyways), but it got pushed back from a launch title and was release sometime in 2006. And it was on the 360 and PC first because that was the platforms Bethesda had the system specifications for to make it for; if they weren't sure of the exact specifics of the PS3s hardware, you can't really develop a game for it. The 360 was out for a while longer than the PS3 was, as well, so presumably developers had more time to work with teh 360s hardware.
And Microsoft paid Bethesda to make the first two DLC for Skyrim timed exclusives; if Sony had been willing to pony up the money, I imagine they could have gotten timed exclusivity, instead, but they chose not to. And, of course, it means that 360 players get to spend a month to pay to bug test Dawnguard for PC and PS3 owners.
Anyways, shifting back to the topic, I'd love the option to sort my inventory by value, weight, etc without needing the Kinect, but I can live without it. Not about to fork over 150 dollars for a peripheral I have no real interest in.