From the very beginning, slot machines — with fast-spinning reels and the sound of coins clattering into metal buckets — were designed to excite the senses and hopefully drive players to bet more. Today, slot makers are hoping new technology will make games even more immersive. One example is IGT’s new Sphinx 4D Slot Machine, placed on casino floors for the first time at Station Casinos properties on Wednesday. Of course, 3-D, in which objects appear to float and move in space, isn’t new; 3-D movies were popular in the ’50s. The technology is not even new to gaming. IGT’s…