Microsoft MVP, Microsoft Support Visiting Expert,
Windows 10 RTM candidate build 10176 has been compiled -- sign off imminentGood news! Windows 10 might officially be signed off this week it seems, as today build 10176 from the th1 branch appeared on buildfeed, and appears to be one of the first candidates for RTM. RTM stands for "Release to Manufacturing", which generally implies the software is complete, but this time round with RTM, that doesn't necessarily ring true.
The Windows 10 RTM will be a build of Windows 10 that is stable and not buggy, it will be missing a number of features that will be coming in later builds of Windows 10 as that is simply the nature of WaaS (Windows as a Service). As Terry Myerson put it recently, "we will never be done" as the software will always be updated. So this time round RTM is just a milestone, a starting point for OEMs and consumers if you will.
If all goes well, Microsoft could have an RTM build of Windows 10 ready by the end of the week, which is very exciting.