Everything is getting built on it. Gotta Garmin? Its running Linux. Is your cable box an Amino, SA, or Motorola? Its running Linux. PS3? Linux. Sony camcorder? Linux. More devices and appliances are using it to build upon.
Most of the cheap, sub-mini notebooks (like the Asus eee) are all turning to Linux. Dell, Lenovo, and Acer sell regular desktops and laptops with it preloaded. Not understanding it is going to leave you at a disadvantage if you care about knowing how stuff works or hacking it to bend it to your will.
Then again if you're content to just be a user of technology rather than someone who understands it, so be it.
I have none of those devices.
lols, a user. You don't have to know loonix to "understand technology".