My main disappointment is with the lack of Flash. Flash is still needed on a lot of websites and every time I've needed it it's a reminder that Adobe has cost Android one of its big advantages over iOS.
This just made me realize that Android-users of newer devices may currently be in a worse spot than iOS-users when it comes to lack of Flash-support.
Since iOS has always been shipped without Flash-support, many popular sites target iOS specifically with HTML5-video. Android however, only recently lost support for Flash and is still likely getting the Flash-versions of videos instead of the HTML5 ones.
I doubt this is the case since Flash hasn't been bundled with the stock browser in quite some time (if ever, I'm having trouble remembering.) The real world websites I've seen and even worked on just serve HTML5 to both Android and iOS since you can't count on Flash being there for the former, and of course the latter doesn't have it.
Personally, I'm glad Adobe are dropping Flash support on Android. Flash screws up page rendering on my PC, requires me to use Chrome just to be able to view net videos, is relied on by advertisers, is slow, crashes, etc.
I'm just sad Microsoft back-peddled on no plugins in IE10.
