Marketing Land’s Danny Sullivan has a nice summary of the state of Android–not really open, yet not closed, either:
Imagine if when Windows 7 came out, it was only offered on only one particular Dell computer. It was also uncertain when or if other computers, including those made by Dell, would ever be able to upgrade to it. Welcome to the “clopen” world of Android.
Another choice quote:
If Android 4 was a real ice cream sandwich, it might melt long before it was delivered to customers.