W3C has released "Standards for Web Applications on Mobile: February 2011 Current State and Roadmap" by Dominique Hazaël-Massieux.
Here's an excerpt:
This document summarizes the various technologies developed in W3C that increases the power of Web applications, and how they apply more specifically to the mobile context, as of February 2011. . . .
The features that these technologies add to the Web platform are organized under the following categories:
- User interactions
- Data storage
- Sensors and hardware integration
- Performance & Optimization