Some time between August and October we should be seeing the first real consumer release of Windows 10. At least, that's the word from Kevin Turner, Microsoft's Chief Operating Officer. Sitting down for the final keynote at the Credit Suisse Annual Technology Conference, saying that they're shooting for a developer preview in early summer and a consumer release by late summer or early fall.
"The thing I want to tell you about on Windows 10 is in the Windows 10 timeframe, which we plan to talk about the end-user consumer experiences in the early spring, we'll have a developer preview and be able to talk to that in depth in the early summer timeframe. And then by next late summer and early fall we'll be able to bring out this particular OS. That's the current plan of record."
The key word is "current plan" — Microsoft's leaving themselves plenty of wiggle room. The Windows 10 Technical Preview has been available for a little while now, but it's going to be a good several months before it sees a wide release.