I already sit on the couch gaming on 50" Samsung LED 3DTV and can play online with friends whatever, and using an xbox 360 wireless controller (which is better than the PS3 controller). Except I have a powerful PC gaming setup encased in a thermaltake lanbox lite which sits next to the TV just like a regular console. Also have a nice 7.1 home theater surround system to go with it.
So tell me again how a PS4 would be better than PC gaming?
For a start you wont be playing Metal Gear Solid or any other PS4 exclusive titles such as Gran Turismo or Killzone.
Also playing with friends on a PC sucks. BF3 for example doesnt even have voice chat on PC what a joke that is. If i want to play with randoms im stuck with a random TS3 server or sit there typing out messages.
PC and PS4 has its uses and i laugh at people who try and use just one.