Note that Fedlet is Adam Wiliamsons own hobby project. But its is true that the Gnome developers do work on making Gnome shell more touch friendly, even though this is probably targeted mostly on touchscreen laptops rather than on "true" mobile devices.

As for Fedora, it already works on various arm boards, but given the condition that the target device must be able to run mainline kernel then I'm afraid we would not see it officially on many mobile devices any time soon due to the overall kernel forking madness.

Also I don think anyone has used libhybris with Fedora so far, but even when he did I'm not sure this would be supportable as an official Fedora project deliverable. But I could imagine a libhybris using Fedora spin/remix - if enough people from the Fedora community would be interested working on it.

Never underestimate AdamW, he is an one man IT army. ;-)