PS2 and the new Gen

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This has the potential to get argued into various sub-categories as the gaming generations go on.
Let's stick with the two we've been using for a decade.

Moot point, this three category system can last for at least 10 years. 10 years from now, everyone's going to feel pretty silly calling PS2 "modern". After all, NES is only 15 years older than PS2. Some people call NES "modern", but that doesn't make that viewpoint any less silly. I can stretch my mind to call the PSX/N64 "semi-modern" and set them apart from the classic section.

Point being that the two categories WILL change. It will be infrequent, but will happen over time.