Raised Floors - Still Relevant?

With the widespread use of serves installed in racks instead of legacy mainframe configurations, the use of ethernet cable in cable trays located above server racks instead of legacy wiring types beetween mainframe boxes, and finally the use of in-line cooling equipment and/or overhead cooling with ducted returns for cold aisle/hot aisle configurations, is the installation of an access floor a wise use of money when developing a computer room?