Okay, I have a Nintendo Wii now and never had a PS3 or an Xbox (did have a PS2 way back in the day). I'm not big into the online fight games, but online racing games are awesome (Mario Kart).
What exactly can the PS4 do?
Act as a dvd player? Is it any good for this?
Act as modem to browse the internet via the TV?
Can it connect to a wireless internet network?
:noob:
Both new consoles (PS4 and XB1) can play dvds, including blu-rays. The PS3 was an excellent BR player, and I assume both of the next-gen consoles will be as well.
You can browse the web through the console, but I very rarely do this on the PS3 (like almost never). Web pages weren't designed to be read on a television. You can do things like Netflix very easily through apps. Consoles are probably more similar to smartphones when it comes to internet activities IMO.
Both consoles can do wireless.