AF has CV-22's - which from what I have read are very well equipped - and geared towards sustained independent operations. They are slated to replace the MH-53 Pave Low platform.
Dollars to donuts the AF "out Ospreys" the Marine Corp. They have the technological vision to really make something out of the MV-22. Look at what they did to the H-53!
The V-22 is tailor made for long-range special ops inserts/extracts (or as they call it "infil/exfil")--the AFSOC mission . If we think of the V-22 as a 1-for-1 battle-taxi replacement for the phrog, we will only cheat ourselves, but if we start thinking about Marine air as a total package that now has a lot more capability, in addition to what we had before, we will come out ahead of any of the other services.
The CV is the same bird at heart, just tricked out with sensors and high-end survivability enhancements. There is a trade-off, though. Those enhancements weigh a lot--witness the reduced payload of the 53J/M v. the Marine 53D. In terms of fleet introduction, the Marine Corps is currently well ahead.