This could solve the problem of getting reliable speeds to devices without Ethernet, that are either hard to wire or don't want to plug in.
Higher density is more costly too of course, but even so depending on the performance that might well still be cheaper/easier then fiber drops everywhere, plus it'd avoid some of the minor but sticky end user physical interface issues of fiber connections. Whether the value is there remains to be seen and will no doubt vary, but as others have said a lot of typical office plans (with drop ceilings, ceiling rails or other designs meant to enable more modular ceiling use) on the surface seem pretty amenable to such an approach.
Ultimately all depends on what the actual implementations look like though, and at what cost.