my ipad completely superceded my laptop in my private and semi pro life, but on a day to day bases, as a graphics designer and cgi visualiser, even my laptop doesnt cut the mustard. my ipad's awesome for a comms device and an admin centre, but not even worth considering for 'real' day to day production work in my instance.
but as mentioned, it depends on your useage - if all you want is to play games, view the web and listen/watch media, - have fun..... then yes, go on to replace your laptop.