I do not think laptops are going to be a thing of the past at all. I prefer having a laptop over a tablet. I had the experience of buying an iPad thinking that it would please me more as a replacement for my laptop. I ended up selling the iPad and moving on to a laptop for a second time, since the tablet just couldn't do what my laptop was capable of.
I still use a laptop and dont currently own a tablet. I'm thinking of buying a tablet because of its lightweight and portability but I do not think it would replace laptops or desktops anytime soon.