You could also use a wireless grip addon, but at £500 it actually puts the 7D+grip at the same kind of price as the 6D.
I already use a wireless remote, but the nerd factor of being able to see on a phone the live view, as well as instant transfer to a computer/server, is indeed cool.
I've made $1 so far this month in stock photography. At this rate I'll be able to get the 6D when I'm 193