Yes they are. Georgia and Cambria are both baroque serif typefaces and are the most widely used for text not only because they look beautiful but also because they're legible even at small sizes. That said, Cambria was explicitly created for on-screen reading.
If you're looking for more clear and aesthetically pleasing fonts for on-screen reading, I also recommend the following serif fonts:
Times New Roman (of course)
Palatino
Droid Serif
Baskerville
Mrs Eaves
Garamond
Bembo
Caslon
Edit: You don't seem to have the option enabled to allow Visitor Messages in your profile, just wanted to thank you for the Karma
