STREET FIGHTER 4 has become my new gaming obsession, while it may not be as technically complex as SF 3: 3rd Strike, the gameplay is still way above any other next gen fighter.
It's basic gameplay schematic is simple enough for a novice to jump in and hold his own against a more experienced player, but rich with super moves, ultra moves , combos and counters to keep a veteran like myself busy for weeks at a time with each character.
The netcode on the PS3 version ( the only one I've tried ...for now ) is superb, even with a "red" connection I experienced little or no lag. Also hats off to Capcom for having a setting that allows an online challenger to interrupt the arcade mode to come in and challenge you ( just like an old school SF2 machine, the best way to test your skills is fighting strangers )
my review, if you like fighting games ( especially the street fighter series ) this is a MUST BUY. I just advise anyone who plans to challenge people online to invest in a decent arcade stick.
9.5 out of 10
here's a nice video with some Ultra moves from the game, enjoy.