As Apple products continue to do well in the market place and cross platforming issues continue to exist for developers using Adobe's Flash or Microsoft's Silverlight rich media there will simply be no other choice for developers soon but to use HTML5 as the new web standard. In a recent move Apple has decided not to bundle Adobe's Flash on some of its new operating systems. More about this issue can be read here and here.

A helpful video presentation of html5 on ipad can be found here and/or you may like to try it yourself and explore the following demos on iphone or ipad using this link. One thing I did notice however is that in 3D transition examples they only appear to currently work in safari. Therefore, full cross platform acceptance maybe awhile away yet and the question arises for backward compatibility of older web browsers. More on html5 found here.