Because I lived in the office environment for 30 years I have always had mixed emotions about receptacles above raised ceilings. Since enforcement is so spotty, cords and cables up there are always going to happen so the question is whether you want a 3-6'line cord to a real receptacle and a chapter 3 wiring method or an orange cord, maybe penetrating a rated wall into a place where they can hide the drop down to a wall receptacle.
I have seen some real nice enclosures for projectors that have the receptacles and A/V connectors in the box, effectively not above the ceiling but they are not the rule.
