Wow, that's pretty cool. I've thought about moving my parents to Linux; my mom only uses the internet, and while my dad needs his computer for work, the software he uses supports Linux. I'm afraid I'm not going to be able to support Windows for them for much longer. I use Linux full time, and Windows is slowly changing. I can still talk them through most problems over the phone, but little changes here and there have made walking them through an issue really time consuming, which is frustrating for all of us.
My chief concern with installing Linux was having to teach them how to communicate what is happening over the phone all over again. Outside of that, I'm pretty confident Linux is a good choice for my parents. My dad actually worked for Digital Electronics for years, and he's been interested in Linux for as long as I've been using it, but I think Linux would actually be better for my mom, because she literally doesn't care about her computer as long as it works. Her computer issues are generally the "the computer keeps telling me something and I want it to go away" type. Fixing those problems on the phone with Windows is a mess, but are basically trivial in Linux. My dad's issues are generally "I broke the internet," so this wouldn't be as helpful for him.
I'm really excited about this. I might honestly go buy an SSD to install Linux on my Mom's computer today. That way I could just drop it in her computer next time I'm at her house. My hope is that the boost in speed from Windows---> Linux, and the boost in speed from a 5400 rpm drive --> SSD would keep her happy long enough to get used to Linux. She's been complaining a lot about speed recently, and last time I was there I discovered she managed to her default user folder from the internal drive to an external USB backup drive. I have no idea how she did this, but it means she keeps running out of space because the backup process now backs up the backup drive recursively.