I don’t disagree with Amazon’s services, but I do disagree with a lock-in system where any purchases one makes, has to be through their POS Kindle Fire.
If Samsung does come out with a similar item, I’m pretty sure that it won’t be to lock people into their shopping ecosystem, and it will be a general purpose tablet for anything that can be done in the “open” and not in a closed system like the Fire/Amazon.
I have a Nook Color, and I’ve rooted it into a full Android tablet. Not difficult to do. (Here is one example: http://icrontic.com/forum/showthread.php?t=93234 ) Then you just go to the Google Android marketplace, download the B&N Nook ap and the Amazon Kindle ap, both free, and you can source e-books from either site.