Could you use one of those screens that are designed to go in front of the fireplace to stop the sparks? Otherwise you could just mix and match your furniture from other rooms and keep the tv etc on different furniture (for now).

the other thign we do is push our coffee table against the front of our telly cabinet when we're watching tv. It means DD can stand there and pat the table but she can't actually reach the telly or DVD player or anything.