Just be advised, holding your breath while waiting fo MS to fulfill a promise is not advisable !!!
What's this next rumour --Ms is designing an update for RED HAT'S Server OS'es which is why they are holding off the next build of Windows for a while.
Perhaps it will be called Windux or Lindows !! (Although there was a "Lindows" in the past which essentially tried to run Windows apps directly without Windows or using things like WINE)
Personally I can wait as long as more things are turned on, like the system file checker, w/o that I either have to reimage or reinstall after I successfully break something. I understand that 10TP isn't Ubuntu, where I always jump in during the pre-Alpha(lsb_release -a) phase(usually a week after the release candidate) . But the difference is with Ubuntu everything is turned on and updated as fixes/changes are made and when something crashes a report is generated to send to Canonical so they know what setup broke something(and they actually fix it). If Microsoft is going to rub elbows with Canonical with their AZURE project, they might as well learn how to update/upgrade at the same time.