The word “Walkman” kinda seems tied to that mid-80s to mid-90s period, but Sony is aiming to change that with its WH series of headphones. The top-of-the-line NWZ-WH505 features a 16GB MP3 built-in, as well as the ability to plug into any other source. Plus you can go all Optimus Prime with ’em and turn them into xLoud tech speakers with Virtualphones surround sound. We didn’t ask if any of the models have built-in cassette playback, so we’ll just assume they do.