Most Chromebooks have small (13" or less) displays. Makes movie watch for more than one person difficult. Also, the displays are not the best quality.
For a couple hundred more, you can get an Amazon Fire 10 HD and add a wireless keyboard and mouse. Small display, but better than most Chrome books. Depending on what you wan to do "off line" you will likely have to add some apps. Even though Amazon wants to keep you "locked in" to their store, it is quite easy to install the Google store and other third party stores.