I came across this article on Forbes about how Windows 10 is starting to look like a bad deal. Article here.
In a nutshell, the author claims that "free" doesn't mean free due to the verbiage "free upgrades to Windows 10 for 2-4 years" that was presented in slide. The author argues that this might mean that Microsoft will start charging for patches and updates in 2-4 years.
My reading of it is more optimistic in that Microsoft will offer free upgrades to Windows 10 (the OS) for 2-4 years instead of 1 like originally announced, and NOT updates/upgrades.
Take a look at the article and post your thoughts.