I remember enjoying pinball for most of my life. Even at 7 or 8, I can remember going to Ocean City, MD and spending most of my time in the arcades than on the beach. My son, however, rarely touches any of my pins. Even when his friends are over, they would rather play outside. It's definitely not a bad thing, just seems weird that a lot of these kids have little to no interest in pins.
I've even noticed over at Flippers, the local arcade here that has TONS of pins, that the kids there rather play the redemption machines than the pinball machines.