I'm here to explain to you that you've got many alternatives for that "something else". That something else could be purchasing an Ubuntu, Linux Mint, Suse Linux Enterprise Desktop or Fedora laptop from one of the niche Linux Hardware Vendors. Or it could be using your Android device as a PC. Or it could be purchasing a $249 Chromebook and using Linux alongside of it to run it as a full desktop PC.
First you'll need to install "crouton", a program created by one of the Google Developers to enable Linux to be run simultaneously as Chrome OS. I was checking Youtube and found this guy demonstrating how it would work on a Chromebook Pixel.
I also found this thorough instruction guide on How-to-install-ubuntu-linux-on-your-chromebook-with-crouton/. The cool thing about this guide is that it distinguishes the differences between what you can do on an ARM versus Intel x86/AMD 64 Chromebook. So it all depends on how you plan to use your Chromebook. If you are going to be doing more program intensive tasks, you are much better off buying the Chromebook with the Intel x86 or AMD 64 processor. If you are going to be doing some light word-processing and spreadsheets, buying the ARM based chromebook may suffice.
And you thought that purchasing a Chromebook was going to limit you to Google Chrome OS web-based apps...NOT!