The rack mount Mac Pro doesn't really make sense for a data center. It's 5U high, which is much too big for a data center. It doesn't have standard server features like redundant power supplies.
The only use case I can think of is for audio workstations, where people have lots of rack mount equipment, so you can have everything including the computer in the rack. But even for that use case it's quite big.
The only use case I can think of is for audio workstations, where people have lots of rack mount equipment, so you can have everything including the computer in the rack. But even for that use case it's quite big.