This is a subject that has been discussed heavily here on The Futurist, through articles like The Next Big Thing in Entertainment, Parts I, II, and III, as well as Virtual Touch Brings VR Closer. The coverage of this topic by BusinessWeek is a necessary and tantalizing step towards the creation of mass-market products and technologies that will enhance productivity, defense, healthcare, and entertainment.
Technologically, these applications and systems are heavily encapsulated within The Impact of Computing with very few components that are not exponentially improving. Thus, cost-performance improvements of 30-58% a year are guaranteed, and will result in stunningly compelling experiences as soon as 2012.
To the extent that many people who seek reading material about futurism are primarily driven by the eagerness to experience 'new types of fun', this area, more than any other discussed here, will deliver the majority of new fun that consumers can experience in coming years.