Spelling it out like that sure gives some perspective - It's a frighteningly low number! They sell 2tb microsd cards nowadays. I bet you could fit 2^64 bytes in a shoebox. So I think uint64 might eventually be insufficient as a size type.
Almost makes you think RISC-V was right with 128-bit extension. On the other hand, exabyte-scale memories might one day be possible, but would it still be useful to maintain single-address-space illusion for these?
Well I used to think 64 bits would be enough forever basically, I guess that's why I was a little shocked that it actually might become insufficient at some point even if its far off.
I'd say it's more likely that in the future we'll regress to 8-bit machines, losing the ability to sustain fab technology, than we'll exhaust 64 bits address space.
Having said that, with the advances of Electron apps, you might very well have a point...
Edit: Well not quite, more like a small closet.