My experience on my android phones is that the software updates transform the device, sometimes addressing many faults. My current android phone is a Sony Arc S and it's great! Does some many things so well! My mate has an iPhone 4 and is just seems so crap compared.
I think they're trying to get the software to a point where it's good enough, but having the range of hardware which is constantly updating means they've go to keep changing things.
The good thing about those Asus transformers is that they've got a proper keyboard to type on, so for me are a bit more usable if you type loads.
Been using a Samsung slate (meant to be an iPad killer)a bit this week and it is good, but for me, I prefer the netbook.