Tekken 5 will be coming to US arcades next month. And in what I think could be a first for an arcade game, you will be able to use a PS2 controller instead if you want, by simply connecting it to the game. Good to see some faint life left in the arcade business. Personally, I think arcades should feature online play with other arcades and/or home consoles. Or that less games should be featured, and the games that are featured should be more like a lan party in a sense that 10 people or so could all compete against each other in the same arcade game, and have team based game types as well (2v2,3v3,4v4,5v5, or uneven matches). Including weekly stat tracking and overall leaderboards.
Another more radical idea, would be to offer a console game in a special version, that cost perhaps 10 dollars more but allowed you free play of the game at the arcade which features the same game. It could be regulated by 10 minute optimum play time intervals or more/less (depending on the type of game) and ofcourse still offer play to people who didn't buy the console version at a regular arcade cost for the game.
Or another option for those who bought the special console version could be that the game cost you only 25 cents each play, with unlimited play, instead of 75 cents or a dollar. Or 5 cents for 25 cent games and 10 cents for 50 cent games. Whatever the case, something needs to be done to make arcades viable again, less we never see them again =(.