As you can tell, I couldn't disagree with you more. My kids are 4 and 2, and I have grudgingly allowed them to use my laptop, because they demanded it. I certainly didn't encourage them, and I will never allow them to play video games before they learn a little thing like reading books.
You and I share the belief that there are things that are valuable for kids to learn. I believe this is reading and independent thought, not pointing and clicking. If your grandma learned it at 50, why can't a kid wait till he's at least learned to sit still and focus on a non-moving page of print, which is the more difficult thing, I think.
They'll have more than enough keyboard and screen time when they are 8 or 10 and I'm sure they'll catch up just fine.
I'm having them focus on social skills, becoming polylingual, talking to people, reading actual dead tree books, going to the library, making mud pies and running in fields.
I believe what I'm teaching them are essential technologies that will help them succeed.
I'd say a huge reason why there aren't more women in technology is because girls aren't introduced to computers (and/or gaming) early enough, or as early as most boys are.
I highly doubt that holding off on video games and computers will be a detriment in the long run.