It'll also be very interesting to see where displaced users move to.
I'd say those who use Ubuntu or Mint can move to Debian proper (I'd recommend Debian testing). It would be least disrupting for them, than let's say moving to Arch, Fedora or openSUSE.
More adventurous of course could try very different distros.
Are there any newer games that are 32-bit? The last such outlier I remember was Shadow Tactics: Blades of the Shogun. Developers there really struggled, but didn't manage to make 64-bit version work due to some messed up middleware. So it got stuck at 32-bit.