It's more likely that we'll end up in a hybrid environment. Previous companies I've worked for already had clean-desk policies. No-one, not even the CEO had a fixed desk.

Teams were assigned areas so they knew where in the building to meet, but if you arrived late and all the desks were taken you simply went and found another area (or if you needed to hide to minimize disruptions).

In a hybrid-model this becomes even easier, because the hardest thing with the above model is keeping free capacity in a growing company.