I think, it is all a matter of the resolution. An UHD display requires 4 times more bandwidth than for instance Full HD (1920 x 1080). So you can project one really giant display (with the danger of having everything much too small for working with) or even 4 full HD displays with virtually the same bandwidth. The tech is inbuilt and the frameworks are available to achieve both of that with ease on the Apple Vision Pro. Apple”s Metal framework makes it possible.
Speed of the WLAN and its bandwidth, although, is very important for this. You’d rather get problems with the network speed than with the devices graphics pipelines for this.
ps: there is also allot of internal scaling going on. The quality depends very much on the distance and size, the user actually has chosen.