From what I heard at NAB, the sales reps said “ProHD is not a format, but a new product line”…yada, yada…and it helped them to obtain things like true 24p…but it IS a tweaked MPEG2 and won’t work with some NLE programs off the shelf, and not Vegas 6. JVC actually had 3 additional booths in the ProHD area with Avid, Adobe, and Apple reps demonstrating their software workarounds for capturing ProHD footage.
But as I understand Sony Vegas does not support ProHD native capture, even though that’s what they were striving for with native HDV capture in release 6.