That market is already owned by cheaper and/or with more functionality netboots, laptops and convertible tablets.
And the smartphone market was already owned by cheaper and/or with more functionality phones and PDAs with phone functionality.
Just like the MP3 player market was already owned by all those MP3 player companies.
Apple are particularly good at redefining and taking over existing markets, especially those that already have a clear pecking order.
I don't think a lot of people are in the same situation as Frogboy where a iPad will do the trick but a normal computer won't.
I am in that same situation and bought a netbook partly to solve that problem.
My guess is that many people are in that same situation.