The next new thing should be something that would allow people using virtual worlds to actually feel what they experience there. I mean, be able to actually smell, feel, touch the virtual reality. Many people find Second Life unappealing because you can not feel what your avatar does, you do not feel what flying is like, you just watch your avatar flying. I do not know what kind of technology that might be 4D, 5D...10D?! But I am sure people are working on that and we are getting close to making that a reality.