My mom and my wife parents are extremely happy with Ubuntu computers. They do browsing, email, Skype, print stuff and whatever else they need just fine. That are way more happy with Ubuntu than they were with Windows, and I am, too, cause in the last three years I have spent exactly zero minutes maintaining their computers. If that's not a consumer-market OS, I don't know, what is? Windows? When mom used it, she always had one problem after another with it. I'm truly sorry for anyone who has to deal with it every day.