Four years ago I went to Linuxcon NA 2011. The unspoken mood of the conference seemed to be, "Linux has won the OS wars, but the rest of the world hasn't noticed." At Linuxcon NA 2015, the unspoken mood of the conference was, "It doesn't matter who won the OS wars."

Some big markers of that:

  • IBM announcing LinuxOne, an offering for people who want to buy Z series mainframes to run Linux
  • Microsoft giving out soft squishy Tux penguins with a Microsoft URL on them, and stickers that said, "Microsoft   Linux"
  • Only one joke about 2015 being the year of the Linux desktop