Tablets are alright if you can get something as good as an iPad to be as cheap, light and efficient on battery as a kindle, or heck, just get closer to the regular kindle battery life, it would be better, but for now, no. I would like to get a kindle for reading, but cant justify spending the $100 on one. But then if you step it up to an iPad, you are paying at least $300-something, even for the mini with worse battery life and you have to be more careful with it. But with an iPad, you can do a ton more stuff on. But then you get that far down the rabbit hole, and I already have an macbook and iPhone so that kind of covers most of my needs other than reading with a kindle.
Plus I hate the digital keyboards, limited use when web browsing, ect of a kindle fire or iPad... I dunno, I think I will just stick with my iPhone and macbook for the time being, maybe for christmas I will drop some hints on a cheaper kindle for reading.