There will be demand. It just won't be mass market consumer demand. It's clearly been priced to target the early adopter, enthusiast and developer communities. Apple has also likely been aware of this supply limitation for a long time, which at least partially explains why the initial launch is limited to the US only.
Supplier capacity may limit Vision Pro shipments (thelec.net)
Sources said Sony's OLEDoS capacity means Apple will only be able to ship hundreds of thousands of Vision Pro at most next year.