In terms of games I'm still intending to get around to, it's nice to see Condemned, Fable II, Just Cause 2, Kameo, Mirror's Edge and The Stick of Truth on the list. That's a reasonable collection to be going on with, at least!
Also, through PS+ I found Super Meat Boy a *lot* better with the PS4 d-pad over the Xbox 360's - but the Xbox One's d-pad is also an improvement over the 360, and that version keeps the music intact... Hmm.
Next question, of course, is how well these run. I recall the Digital Foundry commentary early on stating that a few games weren't quite working as well as you'd hope, but there's been a fair amount of dev time since then...