I'm not really worried myself that alternative Operating Systems will be locked out. However, I am concerned that the functionality of alternative Operating Systems will be locked out. If you see the (speculative but grounded) area near the end of the article - imagine if assertion becomes popular for things such as games or digital movies or the school WiFi. Your Linux PC will never be able to do that, and WINE (probably) won't be able to help. Won't stop you from hosting a server, but it will make it much harder to enjoy a Linux desktop. That's an issue.