Starcraft 2 is not dying quickly, but it is still dying. The coh community is dying, and will be a lot smaller when coh 2 comes out. But it will live on in that game, and possibly in a third installment later on.
NHL '94 is dying
its been dying for 18 years.
NHL '94 is the opposite of a straw man... its a good Hockey game.
its still here.... from 1995 to about 2006 EA kept trying to kill it. handing out cease and desist orders like cotton candy... finally they gave up.
NHL '94 is still here despite EA's best efforts to kill it.
so i think SC2 will be ok because i don't think Blizzard will pull the kind of crap EA did.
also...
the "technology" behind baseball, golf, and hockey is ever evolving.
NHL Hockey today is nothing like it was when the Atari 2600 was making Nathan Bushnell rich.
sports rise and fall in popularity all the time.
and the "tehcnology" that is making skaters faster and more nimble than ever before may be killing hockey at its top level... u see its causing brutal head injuries....
so tech levels do impact sports popularity.