“We’re entering the dark ages! P.T. can no longer be downloaded from PSN even if you bought it!”
We’ve already been there for a long, long time.
There are already hundreds if not thousands of games lost in this way because there’s no way to archive or preserve them and the only method of procuring them is long gone. Remember the Broadcast Satellavew (BS-X)? Long story short, games have been “lost” many times already, especially in areas like cellphone games (that weren’t on iOS/Android – you know, older ones).
It’d be nice if people cared about games other than big-name titles.
(To be honest, everything in the digital age has been going this way; there are countless sites, services, etc. that have just gone “closing now, bye” and removed all data. See also GeoCities, Google Code, etc…)