I love the d20pfsrd.com and use it almost exclusively as the in-game reference for Pathfinder. Basically no books on the table except the scenario - which I much prefer to have in print but have used PDFs of. I almost exclusively play at my house and have a wall full of rules books but rarely use those in play. For Pathfinder, I actually only own a few of the books, the SRD is a much better source than the books. In my homebrew games the rules are also online, but I prefer to prepare "monster" stats with a pen on regular printer paper. Now if I only would computerize those old notes, my game would have a bestiary too!
I use a big 22" roll printer to make paper maps on which we use metal and plastic minis. Was looking at table surface screens a few years back, but they were then still too expensive, and I was not sure if a flatscreen TV would work lying down.