Google Earth with QGLWidget, or QWebView?

[wysota]

You can use whatever solution you like. QWebView is a web browser (2D, basically), QGLWidget allows you to render 3D content. I don't see what cached/uncached/whatever content has to do with it. If you want a flat view then you can use QWebView or QGraphicsView or QWidget or whatever you like, if you want a spherical view then QGLWidget seems the obvious choice if you can do proper UV mapping of the sphere.