IMO it's not classic in the way that Space Invaders and Pac Man are.
Eventually what's going to happen? If some people don't consider a console that's 20 years old a classic, you think another 20 years is going to make a difference?
But not in the same way as The Beatles or Elvis or other bands and artists that were there at the beginning of rock and roll.
So would that break down something like this?
Golden Age = VCS, O2, Intellivsion etc
Silver Age = NES, SMS, etc
Bronze Age = Genesis, SNES, etc
Where do we go from there? When the PSX and Saturn are 20-30 years old, do we come up with another precious metal since those systems will be considered "classic"? When does it end?
If we are going to use some kind of time stamp, does that mean the CD-I, Pippin, and FM Towns Marty become "classic" simply because time has passed?