Once broadband becomes more reliable/faster, streaming services akin to onLive will be
the thing, at least for big budget games from major publishers. No need for DRM, sending out updates/patches, or upgrading hardware. At the same time I don't see App stores like Steam or iTunes going away.
As far as retro gaming and collecting goes I don't see it going away either. There will always be a market for old or obsolete items no matter the time differential between the collector and the item in question. As long as there's a contemporary version there will always be someone who'll appreciate the history or origins of it, and what to collect for it. The same way people collect muscle cars, currency, vinyl records, and antique firearms.
Take me for example, I'm 24. The NES came out five years before I was even born. I grew up playing N64 and GameCube games but that doesn't mean I don't care for their predecessors. I currently have more NES titles than any other platform (other than Steam that is
). I really enjoy 8-16 bit stuff. As time goes on the market will shrink, but there'll always be people like me who'll invest in things before their time.
As for "mindset" that's even hard to determine on a year to year basis sometimes. -Not sure how you can predict that far ahead. If there's another War World there might be no mindset at all.
If you know, tell me so we can all get rich.