Can confirm. I watched some of their developer videos for how to design apps, and it showed multiple safari windows side by side (though never more than two, equidistant from each other - no actual indication yet that we can overlap them). And it looks like we can push them farther away - though that will resize the apps, not just make them smaller.

Could actually be exactly what I've been hoping for since the first real VR stuff came out 10 years ago.