Particularly I miss low-spec, high quality items. I want a good laptop for writing, it has to be only powerful enough to run emacs and a browser. but it has to survive being trashed around and the battery must be available 10 years from now for replacement. Good luck finding that kind of product...
I think at this point new Chromebooks can all run Linux software natively - so might as well just use normal emacs.
Actually I have emacs running on Android as well. I don't really use it often - but it works fine. Maybe if I bought a little Bluetooth keyboard I would play around with it more.