In my optimistic over-enthusiastic mood at the moment, I would be willing to bet we get a new build today, based on this:
1.) As I mentioned in my last post two hours ago, last two weeks I have been unable to upgrade beyond build 9879. I had a desktop, a laptop and two virtual machines running build 9879 past two weeks and even checking for the new builds every day, they did not upgrade further to 9926. As the build 9926 has some bugs preventing usual image customization and sysprep, or at least making it very insecure and difficult I assumed that MS has noticed the same and lets people running 9879 stay in it without upgrading to 9926. I even tested this theory, on the other of the two virtual machines I mentioned above, installing 9841 which upgraded through 9869 to 9879 but not further.
I was and still am sure that these machines would be automatically upgraded just before the release of the next build, in order to prepare for it because as my tests showed, Windows 10 TP does not upgrade automatically to last available build if an old build is installed but instead goes through the whole cycle.
I had just posted my last post two hours ago when both of the 9879 virtual machines which I had running rebooted by themselves almost simultaneously. A moment later the desktop told me Windows needs to be rebooted. All of them upgraded to build 9926 now, tonight, after showing "no new builds" for two weeks. I have not checked the laptop yet but I am sure it follows the suit and upgrades as soon as I turn it on.
2.) It's Tuesday and MS has a soft spot for Tuesdays (re: "Patch Tuesdays")
3.) Less than five days to go to March, MS has very strongly hinted that we would get a new build in February
These three points make me almost sure that we get a new build today, sometime around noon PST. So sure that I am willing to bet on it :).