For me, the allure of a used game market is that I can try different genres of games, and see which I like or don't like. I, too, was wondering what will happen to Gamefly. I am not sure this is the death bell of this company, but it will make it harder to survive I think.
Of the two next generation consoles, I think the edge is to Playstation 4. They seem to have a stronger focus on gaming.
The next generation of Kinect is on the XBOX One. The current iteration of that device was poorly integrated into games, and many of the games were rated poorly. I am hesitant to buy any motion controlled device or any machine that has one, for I have balance issues.