Honestly, outside of work where I use software that is only available on Windows, I have not used a computer for the internet in probably 3 months. All tablet and phone. Samsung/Google Nexus 10 + Samsung Galaxy S3. My wife has the newest iPad an an iPhone 4s, so she never uses a computer either. Honestly, I'm not sure I'll ever buy another desktop.
HTPCs on the other hand...
Here is my build holding my downstairs theater PC and server.
These are all I have here: just after I finished construction of the rack, before the analyzers were in:
Video of the spectrum analyzer after early assembly: (ignore the audio swap, I couldn't use the normal audio because it was a copyrighted song playing during testing).
2nd monitor (up in the corner)