Congratulations! (But are you really interested in only developing apps for one platform? If you, for example, wanted to port one of your apps to iOS, would that mean you'd drop all support for Android? I'm just kinda surprised at the implicit statement here that developing for one platform means not developing for any other platform.)
So, you are going to just assume that your app works fine on both Android phones and on Android tablets?
The problem of having to take into consideration multiple form factors and added features, in the essence of peripherals, is a common one to all modern smartphone OSs. Android / Meego / And surprisingly, even apple, have this problem.
What amount of RAM are you targeting, and will you warn users of devices with less than optimal RAM that you haven't tested on their devices?
True, Google has done everything right for creating a superb environment for development, as one would expect from the braniacs at that company. But I just wouldn't be so complacent about just assuming any given Android app will be a "write-once, run-everywhere" experience...