5G game streaming and portable consoles. The latter is something I have made use of very much on my travels.
Portable gaming is important, it lets you enjoy your favourite games on the go without lugging around huge bits of equipment.
I put this in the similar bracket of PC and laptop use cases. It's simply not viable to lug around a whole PC rig (otherwise I might just do that).
So thank you mobile gaming and in particularly, Nintendo for sticking around with the portable format that isn't exclusively internet based.