I disagree, I think you're projecting your use cases onto others.
Other than IT professionals, I know few if any adults that use their personal computers for these tasks. I'm a software engineer so my usage patterns don't match that of the average user and I'm not about to assume that others use their computers like I do.
I stand by my comment - out of all computer sales, I think that less than 25% would perform the tasks you describe, adults or not.
And then when tax season comes around... well... you need something like quicken or turbo tax.
Well, no, you seem to need these - perhaps your tax is more complicated than 75% of PC users? Taxation is not the same in all countries - I have never had the need to use such tools to do my tax, ever. I'm not in the US (nor are 95% of the worlds population).
This is basic stuff. Computers from the dawn of the personal computer could do this and you want to use a machine that can't?
Sorry, I missed where I said that. I'm not in that 75%, I'm certainly in the 25% - I just don't assume others have the same use patterns as I. All of my non technical friends (we're talking adults here) do not perform these tasks using their PCs. They use facebook, email and browse the web.
Further, forgive me if I'm wrong... but can android's even read flash? Don't get me wrong... flash is stupid... but its common and required on many sites.
Hmm, by default I believe not - but I use my Android tablet for a lot of web browsing, and I've never found that an issue. I'd say it's a non issue unless you're wanting to play flash games (no loss there :) )