Would be really smart if they so made it so that people are able to order actual products through the virtual store for delivery. Akin to ready player one or snow crash.
Would absolutely need some protections so a kid isn't just buying a bunch of random stuff but that's something to be figured out and would help Roblox transition to more than just "a game for kids"
to be honest, if they modelled an IKEA store, and arranged 3D models of their furniture in it like in real world that be amazing. If you could move them around for easier comparison it'd be even better! Nothing feels more awkward than walking back and forth between two similar pieces of furniture for the 5th time wondering if you like this style better or the other one