Update: Belfiore took to Twitter once again to clarify that existing 7-inch devices will still be able to keep the desktop and take advantage of Continuum (thanks to everyone who tipped us on this).
Even after the recent Windows 10 event and the quantity of new information we received, there are still questions to be asked. Microsoft's Joe Belfiore has clarified in a Twitter conversation which devices will see the desktop with Windows 10.
"@marypcbuk @jackschofield @ExNokian @sbisson @dinabass 8" & up = "desktop" w/ win32 apps. < 8" = phones, phablets, sm tablets. No dsktp."
A little clarity, certainly. So it looks like there will be plenty of tablets able to act as a mini-desktop machine. While we weren't exactly expecting phones to have it, it clears up this particular question concerning the 7-inch tablet form factor.