I also own a website unrelated to IT and I can tell you that 85% of my hits are from Windows - and the remaining 15% includes people on their smartphones!
I also have studies to back me up.
http://www.netmarketshare.com/os-mar...sp=120&qpnp=25
Finally... You keep talking about licensing costs. Most people already have computers with Windows on it - no additional cost. So unless you can show an option for the same or less price (one of your "non-exclusive, non-proprietary, and non-expensive 21st century solutions") that does what you ask... then really your point is not contributing anything to the discussion.