Long term this business is analogous to the hosting business: low margin and commoditized. is it a market? yes. Is it a big market? no. Why? because there is no lock-in.
If you can't understand this consider the scenario where 5 or 10 years from now Amazon is providing the infrastructure for 20% of the web, taking in 20% margins above the cost to operate the data centers and making a hefty profit. What stops Microsoft or Google or any other player for that matter from getting in on the action by undercutting them in price?
If you look at any (amazon scale) money maker online there is some sort of lock-in involved which is central to their business. Most often its a network effect of some kind. Go ahead, go down the list of the top 10 web companies and take a look yourself.
Just because something is technologically cool does not mean its going to make enough money to be significant to amazon's bottom line.
Also don't insult people if you can't grasp what they are saying.