Hell Yes! Our group is now on its 21st continuous year, with four founding players and two who have been around for almost that long. We have a running joke about how we will all wind up in the same nursing home, and have the nurse's aids bring us down to the lounge each night to game.
Seriously though, I figure in another decade our next generation will be at the table as well, since one player has started a group for his 13-year-old, and my 9-year-old has been having a blast helping me create NPC's and stories for my current module.
As someone who took a near 20 year break (took finding the gold box 3E adventure game in the WotC store at the mall to get me back into gaming), I don't see myself stopping. I regret all the years that have passed that I could have been gaming.
I've gotten my kids into the hobby. They like playing D&D. My son loves CCG's. I just started getting into Warhammer and hope to get him involved as well.
So, I'm definitely going to be playing in 20 years.
Roleplaying is my primary passion, my creative outlet, the oral tradition by which I intend to pass stories on to my descendants. Something could change that, but it would have to be something that I can't even imagine now.
Like Elf Witch, I came to the hobby late. But I was born to game. I can't imagine not doing it. If I can't find players in the real world, then I'll DM and play online. Unless my mind goes, I will continue to game.