I have the galaxy tab ultra. I use it more than my actual laptop for surfing and lounging and watching videos. For work and productivity I use my laptop. If I really had to pick one, I'd probably pick the tablet. It's all about what you do with it + formfactor
(have a desktop for actual gaming)
Also, the Lenovo y700 is an awesome device if you want an 8inch tablet.
I use Linux and windows. Windows is so much simpler for 99% of ppl that grew up with it.
I love your optimism. But if even a single digit percentage of them migrates to Linux, that would be mind boggling.