Lots of Linux users already know about Wine. So do I, and I’ve known about it for a long time. For the ones of you who don’t know, Wine is a compatibility layer for Unix-like operating systems (Wine is Not an Emulator), designed to run applications built for Windows in said Unix-like operating system.
As I said, I’ve known about Wine for a long time, but Wine is improving every day, and is really becoming a great piece of software.
I’ll take an example: I’m a gamer (well, was before I switched to Linux), and I like to play the latest and the greatest of games, especially Half-Life 2 and related games.