Here is what I know thus far.  the features/far-reaching changes pushed back from ICS will appear in Android 5. Android 5 will be demoed at Google IO in the spring just as parts of ICS was demoed last year at Google IO. expected release of Android 5 than would be late summer to late fall. Or Android 5 and Android-5 Motorola Mobility devices may be given away at the Google IO.

At this point I have some good guesses at the features/changes, but they are only guesses and you should not rely upon them. However, its probably a good guess that that the enterprise features will be re-factored for improvement and that we will see another UI over-haul. Will we see a Google Chrome clone with Silk-Browser cloud pre-processing like KindleFire? Do not know, but it could be a possibility.