That is, if you define "mobile marketing" as marketing over phones managed/tethered to traditional carriers like verizon, Tmobile, etc. What i’ve been counting on is that the internet would be everywhere, cheap/free and thats where the marketing will get delivered. The device will be an internet device that has the size/form factor of a phone (and may have phone functionality) vs. the phone that acts like the internet. Seemingly subtle difference,  but tremendously important.
Link: Technology Review: The Coming Wireless Revolution.