The new Surface has not made it to my local Best Buy so I have not seen the RT OS, I sure would like having a Microsoft store near me. I have the original Kindal Fire it's been a nice little place to keep some of my digital pictures. The new Kindal HD is at Best Buy but since like the my iPad2 and the new iPads not having a micro memory slot again is something I do not like. And YES I know about Cloud and Drive and Drop Box and all the rest f the servers out in interspace. I agree Windows7 is still a great OS I have it on four other computers, I just like to see how new thing work, and Win8 is some what new with some of the old still there.
MS has said it will sell Surface only at its own stores or via its website. If there's no MS store near you and you want to test drive a Surface, you might also check for a list of pop-up stores that MS is setting up during holiday season. Those are supposed to have Surfaces on hand, too.
I use my Kindle Fire original mostly for books and the occasional movie -- for when one of my iPads is charging and I want to watch a movie and surf at the same time. In those cases, I put the movie on Fire and surf on iPad. But with the addition of iPad 4 and Fire 9", I should have more full-size tabs to choose from.
I used to use my husband's iPad 1 as a third full-size screen in a pinch, but we recently gave it to someone who will get better use out of it. My husband is an IT guy who finds little use for tablets. He has a bunch of computers and prefers those. He even has a old PC hooked up to his big-screen TV in his man cave, lol.