I consider the "year of linux" when OEMs ship it in laptops and desktops, in volume.

In other words, it's when I see several linux laptops in Best Buy.

Sadly, we might 'miss' that window. It seems like regular folks are moving to tablets, phones, and Android PCs for home use. Business will be stuck on Windows forever. So it appears the future we're barreling to is iOS/Android for the masses, laptops (mostly) as pure workplace machines, and then the PC gaming sector essentially depreciating Windows and migrating to (in delicious irony) Windows APIs on linux.