A working web browser is hardly that important. If you just want web you can use any OS, like Linux or ChromeOS. If you want IE 6 for a legacy application that'

A working web browser is hardly that important. If you just want web you can use any OS, like Linux or ChromeOS. If you want IE 6 for a legacy application that's a different matter. The browser is just another test case to see if Windows apps will/won't run. The killer feature is the ability to run legacy Windows apps that are not easily replaced on other platforms.