The headline to the press release reads "Gartner Says 80 Percent of Active Internet Users Will Have A 'Second Life' in the Virtual World by the End of 2011.'"
Even though they note that this doesn't necessarily mean that 80% will be using Second Life (proper noun), this is a pretty big statement. Hyperbole? Not with products like GAIA Online and Club Penguin growing at a rapid rate.
There's also a little bit of ego here in seeing 'second life' as a way to describe people's identities in virtual worlds. I coined the name at Linden Lab and it's exciting to watch people adopt.