In its search for another technology to excite us, the consumer electronics industry is reaching deep — into the third dimension. The big push for 3-D TV won’t happen until next year, but already we can get a taste of 3-D in the home — on laptops. AsusTek and Acer both have new models with screens that can show both games and movies in true 3-D, if you’re willing to wear glasses. Testing these has been fun. Many games work with 3-D screens.