No... but they have stated something about a PHB2, DMG2 and MM2 coming out a year after the PHB, DMG and MM.
If we assume an annual cycle of new books (so 2010 would see PHB3, DMG3, and MM3 for 4E), then some may view PHB2/DMG2/MM2 as 4.1, and the year after PHB3/DMG3/MM3 as 4.2 ...
And so on...