UK-based virtual world consulting and research firm Kzero have put out a predictions for virtual worlds for 2008. Note, of course that this covers the 'Metaverse' class of virtual worlds, that is primarily non-game.
The chart they use is a wonderful piece of at-a-glance display, showing age-groups, time of establishment, current population, projected age-groups, and projected populations all in one straightforward (if large) chart.
Obviously the populations given in the chart reflect overall signups rather than active users - the top picks of the worlds represented are (not unexpectedly) Club Penguin and Second Life. The large version of the chart can be found here.
What do you think - will Kzero's predictions hold out through 2008?