[furi]

The non-euclidean idea I like, something a bit like a physical store but it reconfigures based on traditional search terms (perhaps supplied via voice). But that's incompatible with memorizing 3D spaces and also with knowing that you've seen everything. But both of those are probably more to do with scale than anything else. I'm not sure I could remember where I saw a good product within a 3D Amazon because it's going to be the size of a small city and constantly in flux. The multiplayer thing is a definite strength too.

>could also have been made 20 years ago when physical stores were hesitant about moving online

Indeed, but what we've learned since then is that consumer convenience is king (see: dark patterns in cookie prompts). Businesses were wary of the Internet transition but the force of convenience pushed them into it, I don't see a matching spike in convenience here.