We'll get a major Android release every year from now on: Android M tomorrow, Android N in 2016
From the looks of it, Android M will have roughly a year to reign, as its successor, Android N, is said to certainly arrive in 2016. This is not a rumor, mind you - Hiroshi Lockheimer, the VP of Engineering for Android, confirmed that Android M is indeed coming tomorrow, but that's certainly not the biggest piece of news he broke.
Lockheimer revealed that there will be a major new version of Android every year from now on and Google will undertake a “yearly cadence of big releases" - Android M, as we said, will arrive tomorrow, Android N will see the light of day sometime in 2016, closely followed by Android O (Oreo, anyone?) in 2017, Android P in 2018, and so on.
Yes, we shouldn't expect any minor "incremental" yearly releases from now on. Here's to hoping that each of the upcoming yearly releases will be polished enough and not just rushed.