So, this week he gives me a call and tells me that his Windows laptop battery died and he's been using my Ubuntu laptop. He tells me about how he found the Libre Office spreadsheet and he's been filling out his work documents (he works in high-end custom home construction) with it and transmitting it with Google Docs.
Then he tells me that he was able to add their house printer and print his docs from the machine using the instructions from Ubuntu's help system.
I was pretty much floored. My parents are NOT technical people. I offered to get him a Windows license for the machine but he said that it's working fine for him.
People make jokes about the "year of desktop Linux" but if my dad, without calling me ONCE, can use Linux productively to get things done, then, in my opinion, Microsoft is in trouble. As far as I'm concerned, their claim to usability in the PC OS world is dying.
Maybe this doesn't mean a whole lot in the big picture, but Linux has cost Microsoft at least one end-user license for an average computer user. For my family, I'm not sure how else you define a "year of Linux desktop."