As my sources have been saying for some time, Microsoft is planning to deliver a second update for Windows 8.1 on August 12, this month's Patch Tuesday.
And, again, as those same sources have said, Microsoft won't be making a big deal out of this next update.
Update 2, to which Microsoft will be referring as the "August update," won't be mandatory, unlike the first Windows 8.1 Update. It also won't be cumulative. It'll be pushed as just another monthly update to Windows 8.1. It will include some relatively minor design changes, I hear, but nothing big, feature-wise.