With the onset of mobile payments and m-commerce, I believe that the world of marketing will once again change forever. Make no mistake mobile payments are not remotely the force they can be.
But imagine if the consumer now has the ability to buy any product right on his mobile. It converts every ad into a potential point if sale.
If you see a hoarding for a Deep Purple concert, with a call for action "SMS Deep Purple to 52121" to buy tickets on your mobile, wouldn't that be convenient. You don't have to go online, you don't have to visit the nearest Cafe Coffee Day. Just send the SMS, and use your card to pay. I am sure security concerns exist for payments on a new medium, which will pass with time and with more businesses promoting mobile payments.
Now the marketer doesn't just get the payment but also has the mobile number of the consumer to communicate future events (I know the spam haters are already thinking this is a bad idea). But as long as there is an opt out or opt in option for the consumer, he should be ok with it.
Recently Vodafone has promoted purchase of IPL tickets on the mobile, you can bet that you will see many similar efforts in the not so distant future.