BARcade is brilliant. I would love to find a bar with all the old favorite arcade games in it. I used to love the arcade.
I don't really see arcades making a comeback, but the bars and stuff that have those games should do well. Some of us older people have good memories, so there's the nostalgia factor, plus it seems that younger people are a bit intrigued.
The social dynamic has changed though. When I was a kid, we couldn't wait to go out, be out, be with other people. Now, more and more people "socialize" online. I see more kids playing video games at home or going on Facebook, etc. than going out.
It was great fun to go hang out at the arcade, talking, laughing, listening to good music, competing for the high score... ah, the good old days.