Phones are definitely getting bigger. To wit: on the left is the original Droid, measuring 3.7 inches. In the middle the Droid 2 also has a 3.7 inch screen, but a larger bezel. And on the right? That's a leaked photo of the Motorola Droid 3 (or so it's believed), showing a 4-inch screen.
There's some confusion over whether this is the Droid 3 or another Motorola handset, code-named Targa, which we've seen before. The spare parts website that showed this photo called it the Droid 3, but mentions the Targa name also, which is - and correct me if I'm wrong here, folks - the codename for the Bionic handset.
Whatever it is, the fact that spare parts for either the Droid 3 or Bionic are showing up online suggests that Motorola's readying this handset for launch anytime now. [Global Direct Parts via Phandroid via Droid-Life via BGR]
UPDATE: Giz reader Fryhole directed me to PhoneArena's explanation on the Targa, which you can read over here.