I went from 360 to PS4, although it is a decision I, at the moment, regret. There aren't really any games that I have an interest in at the moment, so I've barely used my PS4 since getting it for Christmas. I've always really gone with whatever console my friends got, so that was a big factor in me deciding to get a PS4. I probably would have got a PS4 anyway considering its cheaper price and (in my opinion) better exclusives. I've wanted to play LBP for a long time but I haven't been able to due to not owning a PS3 and The Last of Us will definitely be a purchase for me once it is re-released on the PS4.
Going from 360 to PS4, despite saying I regret it, was probably the best decision for me, though. I don't really have any interest in XBOne's television features (who needs a television in a games console when the games console is on a TV anyway?) or their exclusives, so PS4 (with the bonus of it being cheaper and not having to use Kinect) seemed to be the ideal option, especially with my friends getting the console too. However, getting next-gen consoles at this stage probably isn't a wise idea unless you have a particular interest in some of the games that have been released already.