Will an application using QtWebkit be fully cross platform?
I would like to know if an Qt application using the QtWebkit component (browser view) will work across both 32-bit and 64-bit versions of Windows, Mac OSX, and Linux?
Is it possible to use QtWebkit in a headless manner?
QtWebKit is based on WebKit engine, the same that drives Safari and Chrome browsers. There should be no problems with running it cross-platform. As for HTML5 and AJAX, I think it's also supported, but have not checked myself.