The reason why netbooks were popular was because they were portable, had good battery life, and could run x86 Windows applications. The netbooks that were portable, had good battery life, but ran x86 Linux applications were returned to the stores in droves...
Unless you have a way to run your favorite programs, that you already paid/have licenses for, your platform will likely not be successful.
MacBooks took off when they 1st established their name with the popular iPod and iTunes, and 2nd, started using x86 compatible Intel processors. Once, 3rd, bootcamp 'happened', there was nothing holding users from caving to the marketing hype, and being able to have the 'best of both worlds' (sans cost).
Unless there is some kind of superior emulation, or some serious recompiling of existing software for ARM, without cost to the users, ARM will not take off.
However, if the OS using ARM is an extension of the Android/iOS platform, and the users are able to use the same apps they already paid for on their phones with their notebooks, this may succeed.