I recently received an old Barnes and Noble Nook Color, a Nexus Seven tablet, and a Microsoft Surface.
The Nook, reflashed to cyanogenmod and bluetoothed into my car’s ODBII and smartphone interfaces, has become a pretty good special-purpose carputer for my plug-in hybrid.
The Nexus 7 is a really superb e-reader, in my opinion. Stock software.
I haven’t found any real use for the Surface yet. Too unwieldy to replace a tablet or phone, but not really a comfortable replacement for a laptop either. Nice display though… anyone kind enough to share their suggestions for uses?