Windows 94 Beta (a.k.a. Chicago) was just a pre-release of what we nowadays know as Microsoft Windows 95. Windows 94/Chicago looks like Windows 3.11 featuring a Windows 95's Start-menu structure and Windows 9X driver installation method. It's funny to see how everything finally turned in Windows 95 (and even later 98).
Just give it a shot I would say when you still have a good old 386/486 or Pentium computer (of course you can also use a virtual machine).