Let's see, a 4.1" phone with a 1GHz ARM CPU, a 7" tablet with only a 600MHz ARM CPU, both with Android 2.2. A 10" tablet with an Atom dual booting Win7 and Android 1.6. All called the ViewPad. While you should get binary compatibility between the 4" and 7" models, it makes no sense that the 7" has a significantly slower CPU. The 10" will have no binary compatibility with it's little siblings.
What are the marketing people at ViewSonic smoking? This will cause endless confusion in app compatibility for software vendors and users. Stop smoking whatever it is you're smoking and at least rename the 10" model something other than ViewPad.