Here are some neat Android3 features of the upcoming Web API. Simply put, it exposes some of the system services to the browser (eg. camera and mic):
http://www.youtube.com/watch?v=VWhxrf6a9nI

This is very pre-esque, and a very progressive feature. This will enable new features that are easily rolled out, tested, and upgraded *without* the need to install software. This brings new sophistication to web apps, and continues to bridge the gap between native apps and web apps.

Very cool.