Not quiet the same thing. I can make my big TV into a PC monitor and while it gets the job done i dont prefer gaming on it.
And using the PS3 controller while playing an MMO on the PC does not work.
You can hook a PC up to your big tv and I have a wireless controller for my PC that works perfect. Dunno about ps controller, I have an Xbox one. It takes a little more setup and moving things around, but the PC can be just as comfortable as console gaming.
I have played my PC games with a wireless
Controller laying in my bed multiple times with my main television.