I make coffee on the road often under circumstances closer to camping than business travel. I don't think I'd buy these since they just wouldn't make my "kit" appreciably smaller.
I carry a small cooler in the back of my truck that holds:
*A kettle (A perc pot with the perc stuff removed)
*small blended fuel camping stove
*two bottles of fuel (I get about 15 large cups per bottle)
*Hario hand grinder
*plastic pour over cone
*filters
*coffee
The only thing these would take away is the filter cone which just isn't that big and if I run out of fuel or filters I can replace them 24 hours a day at walmart.
So where's the upside? Could you imagine trying to use one of these things outside on a windy day? Neat concept though.