The Lumia 900 differs mostly from its predecessor in size. It's a 4.3-inch-screened phone, compared to the perfectly usable but slightly small Lumia 800, which clocked in at 3.7 inches. There's a slight sacrifice in aesthetics with that; in the 800, there was this cool effect where the curved screen seemed to fade away into the body of the phone, sort of like an infinity pool, due to the curved glass front and lack of visible bezel. The 900, on the other hand, does have a bezel--the Nokia rep told me they were a little unsure about how folks would respond to it. I found it not quite as nice-looking as the melty screen on the 800, but not glaring enough that it really takes away from the rest of the phone.