Kzero has a nice little graphic showing predicted growth of various virtual worlds during 2008. I'll ignore the specific numbers since I have no idea what they actually mean but in terms of general trends it seems reasonable. There's a Slideshare presentation to go with the image.Meanwhile, over on Second Thoughts, there are some predictions for Second Life in 2008.
I don't go in for crystal ball gazing myself - largely because I'm crap at it.
