This is why I install Chrome on my family's computers. Set it and forget it - auto silent background update means they'll always have a current browser.
This is what I love so much about Linuxes and package management. I set them up, software update notifications pop-up (I liked it best when they appeared in the notification area) and everything is quickly updated mostly behind the scenes.
I find the idea of every program having its own independent self-update mechanism ludicrously primitive.
Apparently Google agrees: when you install Chrome on Ubuntu it uses the OS's update manager to keep itself updated (by adding its own APT repository). Nifty.