We're using this. BES5 server for the old devices. BES10 BDS (BlackBerry Device Server) for a couple Q10s and a couple Playbooks, then UDS (Universal Device Server) for a bunch of ipads.
All three servers are managed by one interface, Mobile Fusion.
For us, it's not about "hey, apple has this" or "hey android already has this" it's about "hey, I can manage these all from one console". Saves a tonne of time, and a tonne of hassle. I am not super happy that with BDS/UDS they moved to Active Sync, but our AS Server is behind a firewall and we have the UDS devices set to VPN in automatically to get to it. The BDS devices are "in the network" like the old BES stuff and don't need a VPN. Hell, I had a case open with BlackBerry as I needed RRAS and the UDS/BDS working on one server, long story short, it looks like a KB article will be made based on that support case.