Yes. Most Vita games can be played offline. There are very few games currently that require you to be online.
No you will not be able to play the games either way. Systems changes on the PS4 allow them more design capability for games and many titles will be released in a downgraded PS3 version. You still will have to have a PS4 to play PS4 games and a PS3 to play PS3 games.
Yes, but you cannot play multiplayer games and you cannot get updates if you play offline.
Yes, you must buy a PSPlus membership to play online games on the PS4.
you download them online and some u can play offline that u have downloaded
No, the PS4 will only run the games made for the system. But there is a application on PS4 called PlayStation Now which will allow you to play PS3/PS2 games for a price.
No it will not
No the games and PS4 system have not yet been released and there is nowhere to play them unless you are part of the EA family of developers with an advanced release PS4 for the game developers
No, the PS4 does not have backward capability and cannot activate (play) PS3 or PS2 games.
The standard games are played on a physical board. With technology, you have the privilege to play checkers online or offline. There are many applications for PC or mobile to play checkers offline.
yes
In short, no. Sony haven't released any information regarding a PS4 yet, so we can only assume that you cannot. It is highly likely you will be able to play PS3 games on it, that is - if it really comes out.
No