You have a PS3, your set in the gaming market for this generation dude.
But here is probably what would happen (in my mind) if you got a Wii or 360.
1) The Wii Scenario
You buy the Wii and a few games, your main christmas money / present is the Wii (You know how everyone gets 1 big present, and little shitty ones).
Your getting the grip of it, waving your hand around crazy. You setup your wifi connection and are dissapointed with the content available, and how bad the online play is.
You throw up xmas dinner once you see some of the graphics on wii boxing and bowling.
You decide to order a wii-fit and extra nunchuk because the wii is losing its fun factor. The wii-fit is sold out everywhere, you never do get one. You find a nunchuk on eBay, your relieved. You recieve it, and it turns out to be some crazy japanese fake which doesnt work.
Your fedup with your wii, and go back to PS3. Where you play online with your friends, experience some amazing games, wait it out for some more amazing 2009 games, experience PS HOME and appreciate your PS3 a whole lot more, now you know how Wii owners feel everyday.
2) The 360 Scenario.
You buy a 360 elite and a few games (mostly exclusives you havent played on PS3) like gears and halo. This is your main christmas present.
You setup your console and begin playing Gears. You realise how much better Resistance 2 was, and how you would have loved playing 60player online madness.
You decide you can play online too, you setup your wifi and click connect. Your first problem is that you havent bought xbox live. Your broke from all the xmas spending, and you forgot that online costs money. Your parents say no, and you dont get to play online until February 2009 where you have some extra cash.
You sign up for live, and you choose a username. But its already been picked. You spend 3 hours making a username, and in the end your so fedup you go eat your dinner. Your sibling stumbles into your room and mashes the controller, so your username ends up being: iROn---YuPpy.
You come back and see the screen saying 'welcome to xbox live iron yuppy. Your mad as hell at your sibling and beat him/her. Your parents ground you for 2 weeks.
You try to change your name, but cant. You cant make a new account because you need another live card! So you end up playing as the iron yuppy.
You get the grip of online, and realise the 360 exclusives arent that amazing, and PS3 would of been the same. You keep pressing the wrong playstation buttons and get pwned by 360 fanboys who nickname you sucky yuppu.
You twist your wrist after using the huge 360 pad, its too big for you. You cant play 360 now with one hand, and are grounded inside.
Your xbox gets rrod. Your mad and end up going back to ps3. You dont giveup. You send your 360 to repair, you get a card saying your estimated repair date is March 2011, and your 360 will be shipped to you in October 2011. Your 360 is used as a doorstop forever more.
my imagination :-)