It would seem to me that it is mostly targeted to things like netbooks or other small laptops, or tablets. The netbook platform actually makes sense, and from what I've heard people running those love Unity or Gnome 3.
Tablets just don't make sense, since almost nobody replaces the OS on them with something different. About the closest I've seen is maybe running something else in a chroot, without X11. Getting Gnome on one of those is a real pain anyway with all the proprietary drivers and great variation in hardware. They aren't like your typical PC motherboard where no matter what you can at least get the thing into VGA mode using the same IO ports you'd have used on a 386.