Listen, the web evolves and evolves according to standards.
And because Android allows multiple competing web browsers to compete for standards support, it picks up support for these standards sooner than iPhone. Firefox for Android appears to support WebGL as of version 24 according to this table. Safari and Safari wrappers, on the other hand, support standards only once Apple makes the business decision to no longer deliberately exclude them. For example, iOS supports WebGL, but only in iAds approved by Apple. The limits of Safari and Safari wrappers appear calculated to encourage application developers to buy an additional computer and a developer license and develop a native application instead of not buying a Mac, not buying a developer license, and developing a web application instead.
All proprietary lock-ins will naturally be kicked out eventually.
The universe will die of heat death "eventually". To exaggerate slightly less, anyone can make an iPhone "eventually" once copyright in iOS expires. To exaggerate even less, if I eat "eventually", I will die of starvation first. People making applications for the phones that exist now need to eat now. I was referring to the foreseeable future, not 95 years from now.