More people than you'd think, not saying they'd be good at it but they'd do more than play video games all the time. Nowadays you have people streaming, making podcasts, making tf2 hats, youtube videos, cosplay, fan-fiction, dancing, playing non-professional sports, graffiti, etc, etc.
The percentage of people who take full advantage of being freed from working to survive isn't terribly important; it's the number.
More people probably are naturally oriented in a way compatible with that (perhaps not to be commercially successful at it, but that's expressly not an issue) before they are aggressively socialized out of it by people who want to prepare them for the economic necessities of surviving in the world we actually live in, where indulging such an orientation without the particular combination of skill and luck needed for commercial success is often a recipe for misery.
Realistically? Probably better than 99% of people would play video games and watch TV their whole lives. Not everybody is oriented to be an artist/author, an inventor, a scientist, or some other creative type.