Also no websocket support in Android browser yet (http://caniuse.com/#feat=websockets). This makes things a little less ideal for realtime gameplay (even with the fallback options provided by socket.io).
That's pretty sucky. Does anyone know if chrome for Android support it? I was hoping for WebGL and Websockets in 4.0 but I guess neither is around :(
The current direction does seem to be towards end-of-lifing the Android browser (and ChromeOS) and moving Chrome in as the default.
Should also note that DeviceOrientation (aka "accelerometer in the browser") is in Android 3.0+ (although that doesn't do much for most of the devices out there).