Actually, this isn't true. While it's now much easier for consumers to install software and for developers to get paid from software, the actual process of getting an application on a phone is much harder.
I wrote little cardcounters for poker in highschool to run on my WinMo 5 phone. Compile it with the C# compiler for ARM, and e-mail a little exe to my phone and run it. No fees, license agreements, provisioning profiles, etc. involved.
I think the whole point is that the $99 and having to use Apple's development package and going through Apple's approval process is an impediment to development. You can't write an app for whatever you want (http://www.huffingtonpost.com/2010/02/19/banned-iphone-apps-...) because Apple censors App development. True open source should be open. Iphone and Ipad are not truly open.