Did a quick browse and my main takeaway is...it's more cumbersome. More scrolling involved to see any one thing, Full Game Trials you've already completed are no longer missing from the menu (they say unavailable, bust still, I liked just not having them around).
It's more to look at I suppose, more graphics, and things...and they do say it's the "store with more" in the introductory hype video. But mostly it's more at the expense of sensible. I won't care in a few days but right now, man, overboard.
It's also more of a wait. Hit the icon and wait to get in...it even comes with its own loading screen now.
I like that they link you to a demo of the game from the full game purchase menu if a demo is available. Finally going to give Bioshock a taste to see if I can get over my general distaste for FPS enough to drop $20 on "one of the best games of this generation". Nice touch Sony.
Also, seems like they're using menu sounds straight out of Gran Turismo 3.