Thanks for the explanation, I haven't been following the progress of SPDY so I'm not familiar with the detail. What use cases would be hindered by this new standard?
I've never read it in enough depth to verify those claims, but the response from the standard group is always "then use HTTP 1.1", what is as a non-solution as it gets.
SPDY was great exactly because it was not the standard, it was an extra option, available if everybody agreed to it. Call it HTTP 2, and it will become mandatory in no time. IETF calling it optional won't change a thing.