This document discusses HTML5 apps and different approaches for building cross-platform apps, including PhoneGap, W3C Widgets, and other runtimes. It notes that HTML5 apps can access device APIs like the camera and GPS through frameworks like PhoneGap. It also summarizes pros and cons of different approaches, such as PhoneGap providing access to many device APIs but not being a standard, and W3C Widgets being very simple to create but only supporting a few APIs.