One area i think they could have a worth (old 8 bit computers) is with young children. Sure you can offer your kids Minecraft (on PC), Zelda/Mario (on Nintendo), but it is a very real parenting problem to not have your kids play maybe unsuitable stuff too young (maybe their friends has CoD at home etc).
I had been keeping my old Atari 800XL for my kids, but sadly time worked against it and last time i booted it up the 5.25 Floppy Drive was not working properly. Damn shame as i had a massive collection of games for it, all mostly suitable for young minds too
I do however have some old consoles and child-friendly games for them, and these 'mini' reboots could fill those kind of gaps if they had the right games (which most seem not to sadly).
So 'Emulation' it is going to have to be, where my old games and hardware no longer function well.