I estimate I have about 100 daily counts of frustration because of elements moving while I'm interacting with the UI. It drives me crazy, and I assume it drives younger people even crazier because they have quicker reaction times.

It's a disgrace that modern UIs haven't dealt with this.

I had high hopes for Windows Phone because it was the only mobile OS that had a realtime UI. I don't care how long an operation takes. Just give me immediate feedback! And respond to my input as if it was mission critical. Why is it so hard?