Questions about the PSN on PS4

[Tom3k]

wangjingwanjia said:

I have some questions about the PSN on PS4 that I would like to get sorted out. :)

1. My PS2 and PS3 games that I have bought for my PS3 from the PS Store, will I be able to play them on the PS4? Today or in the future.
2. Will I be able to buy games from the UK and US PS Store like on the PS3 or just the HK? (multiple accounts thing)
3. Will my friendslist, trophies and stuff that I have collected on the PS3 remain when I sign in on the PS4, or will they not be shown anymore?
4. Will there be released PS2 and PS3 games in the PS Store for PS4?
5. Any other useful information to know? Like what is new on the PSN that is not on the PS3.

1. Nope right now, in future? Gaikai for PS3 games?

2. Same as on PS3.

3. Everything will be there.

4. Gaikai for PS3 games. 

5. Your friends list will expand to 2000 people up from 100 on PS3.