Yes the ps3 can house a number of people who can all play downloaded games amongst them etc, etc

But just to be certain, can the ps4 do the same thing? I don't think anything has been said on how many accounts can be on one ps4 and how many ps4s can one account be tied to.

I don't really see why they would limit the number, especially considering they probably want the PS4 to be a family-friendly console.

They said 1 PS+ account gives all users access to ps+ on your console, so we can have more than 1, I guess its 16 like on the PS3.

Exactly what I wanted to hear!

so basically if i have lets say 3 accuonts. and i have PS+ on my PS4, all 3 accounts will have access to online play? do you have a source?

Yep. They said this at e3, cant find a link atm but it was pretty big news last week.

About the playstation plus.
Here is the link:

@AUSTIN_GAMERGOD one membership

— Shuhei Yoshida (@yosp) June 13, 2013

And according to Yosp you can order pizza from the PS4 :D
Source:

@buckcardgame yep

— Shuhei Yoshida (@yosp) June 14, 2013

Here is more information about the PS4

@Doctor_Thomas yes

— Shuhei Yoshida (@yosp) June 13, 2013

Just curious, what If there are two ps4 in my house, living room and bedroom, would I need two ps+ accounts or is it ok as long as only one of them is online...