A few questions or items come to mind for me:
1) I assume it'll still have a disc player (Blu-Ray, likely). They'd be shooting themselves in the foot again, ala PSP Go, if they went all digital.
2) They already confirmed that it will not be reverse-compatible, which is bullshit to me.
3) I'm concerned about one thing: what happens to all the products I purchased already on PSN? For example, will I be able to carry over my PSN-bought copies of Double Fine's games or Limbo? I really, really hope so because otherwise, that's even more bullshit.
4) I hope it won't be exclusively online necessary.
5) I'm curious to see how the "friend takes over for you" works. Hopefully it's something you can turn off if you don't want to be bothered. Obviously it would need to have both parties agree, but I don't want to be bombarded by requests or something.