Mobile is one of them, although OP's arguments are valid as well. (http://conferences.sigcomm.org/co-next/2013/program/p303.pdf http://conferences.sigcomm.org/c

Mobile is one of them, although OP's arguments are valid as well. (http://conferences.sigcomm.org/co-next/2013/program/p303.pdf http://conferences.sigcomm.org/co-next/2013/program/p303.pdf) Also, among many other things: every thing over SSL. Single Connection. Also, less of a technical problem, but as many already mentioned, too complicated as compared to plain text human readable HTTP 1.x