For those unfamiliar with RTM builds, basically this is the final build of a piece of software that is more or less the version that will be released to consumers. Typically there will be little to no changes made to the RTM build so what you see is what you get in the consumer release, assuming of course there are no last minute breaking bugs that forces the developer to pull it back.
Interestingly enough @WZor’s tweet is in line with an earlier report from last month in which AMD’s CEO Lisa Su revealed that Windows 10 would see a July release. Su was quoted as saying at that time, “With the Windows 10 launch at the end of July, we are watching sort of the impact of that on the back-to-school season, and expect that it might have a bit of a delay to the normal back-to-school season inventory build-up.”
Microsoft themselves have yet to offer up an official release date so until we hear from the Redmond company, these speculations and rumors should be taken with a grain of salt for now, although with July only being a little over a month away, you can bet that we are pretty excited for it.