This is cute, but the UI is uncannily not there (I think there were multiple attempts of designing the XP for web already which looked more authentic).
But my biggest gripe is, why represent it as a file system with WordPad displaying HTML? I get the idea for media, but not for the articles.
It's pretty obvious that Wikipedia should be a single CHM file. That would be nice and much more immersive.
CHM files were great, it actually made documenting enjoyable. I miss those days.