A little homework by the author would have revealed that Sony has already launched the ability to download and install custom apps to select models of their NEX line of mirrorless cameras. Not quite the robust iOS ecosystem (it's not open to 3rd parties at the moment) it's still a major first step.
See the apps at: http://playmemoriescameraapps.com
Ugh. Pentax just unleashed a whole lotta ugly!