And in extension to Plaupius' arguments: Apple is offering lower licensing and distribution costs than the traditional platform holders which to gamers means one thing: lower prices.
For a DS game only 50 % of the retail price arrive at the publisher/developer after cost for platform licensing, production of the proprietary physical media and packaging, physical distribution and retail margins. Apple leaves 70 % of the retail price and for 30 % the publisher gets all expenses paid, from licensing to age rating to digital distribution (and backup) to credit card fees. Add to that the fact that digital distribution means no risk of producing too few or too many copies for your software which is always very costly. If you publish at the iTunes AppStore you will never have to worry about your game being out of stock or a mountain of unsold inventory being returned to you.
In effect a game that sells for $40 on the DS could sell for $25 on the iPhone/iPod Touch and make the same money per copy. Apple will keep this advantage as long as Nintendo and Sony stick with retail.
Hardcore gaming is a bubble economy blown up by Microsoft's $7 $6 billion losses.
