I think using a dedicated system (either a phone or laptop) is more preferred and safer. Though, someone talked about using Ubuntu operating system or other Android OS. It is good to use new technology, but one will have to take time to learn how to use. The time I first ran Ubuntu on my system, it was fun, but I was more like a novice learning computer afresh, and I can't go into the market with that so I don't get myself messed up.
I make use of phone more often than laptop/desktop (which is once in a while), that is why I am more curious about the mobile version of everything we are talking about.