I think we are really far from RTM, I tested build 10049 on desktop, and I am not installing next build on my 930, the beta builds of Windows 8 were much better.
If the team responsible for Windows Phone is now working on Windows OS then we are screwed, knowing how they make releases for their updates ...
So ... what about us in the rest of the world ? I bought my surface 2 last summer, and at that time Microsoft did not tell me it is not going to work on its software anymore ... shame !
I really don't think W9 will ship in early/mid 2015 maybe late 2015 or mid 2016, one year between announcement and release ? you are too optimistic ^^
Why still calling it Windows then ? Microsoft Tiles ! ^^