The above is very far from clear at this point. In case you didn't notice it, the App Store just hit 10 billion downloads [1]. I'd say that's a pretty relevant bit of history. Also note the amazing 60 apps per idevice [2]. And don't conflate openness with developer profitability -- in one case, Microsoft had both, but it's not clear that the latter leads to the former. Right now, I'd guess there's easily one or two magnitudes more developers supporting themselves with iOS apps than with android apps.
The fact that my gf and mom's iphone and ipad can't run random executables is, IMO, a feature not a bug. I got so tired of telling them, "No, do NOT click yes on any dialog box. Do not install anything. Do not agree to anything. etc" And yet somehow, spyware / crap always ended up on their damn computers. Apple's vision of utility computing, where the computer is a tablet or a phone that just bloody works is one of the best things that can happen to computing intended for widespread adoption. Further, curation of apps similarly is awesome for them. I'm not as stoked about it for myself, but I'm very clearly a distinct minority.
[1] http://www.engadget.com/2011/01/22/apples-app-store-hits-10-...
[2] http://www.readwriteweb.com/mobile/2011/01/more-than-60-apps...