It does give the data center a better look and also sounds more professional. However, many big companies such as Internap, and Equinix don't even use Raised flooring in the data centers they have. I know the Internap one in NYC has no raised flooring and also none of the Equniix data centers have Raised Flooring.

Cooling isn't exactly the issue it was more so for the looks, and the ablity to run cables and to look cleaner. However, it will allow the data center to be in the low 50's.