Like someone said before build a home theater pc. You can get a cable card from your television provider, and have a custom guide for your digital cable and then load up XBMC/WMC/Boxee to handle your file library. Use plex and have your files available to play on any of your devices.
Make sure all your stuff is in the cloud, and easily accessible and organized so you can switch to a new device/computer at a drop of a dime. But don't invest in Apple's or Microsofts cloud ecosystem; the whole point is to be able to jump from OS to OS
If you've done all that why not learn a programming language? If you enjoy the web, learn the basics of web programming; if you prefer mobile devices learn how to build an iOS or Android App; if you like computer apps, dive into that.
If you aren't entertained by technology anymore, challenge yourself to learn more about it and contribute to technologies growth.