I think vinyl is only coming back if you're a DJ, or if you're a collector of vinyl (in which case it's not coming back, they're just still collecting it). I haven't seen a vinyl for sale anywhere in I don't know how many years now!
There was a cool record shop many years ago, here in San Diego, called
"Blue Meanie" - but they became extinct like every other record store out there, it seems.
Besides, some things don't come around. You tell me if you ever think something like cassettes will ever make a come back... or VHS!