Google Chrome OS
From the announcement of Windows Endgame Day Zero:
Google Chrome OS will run on both x86 as well as ARM chips and we are working with multiple OEMs to bring a number of netbooks to market next year. The software architecture is simple — Google Chrome running within a new windowing system on top of a Linux kernel. (emphasis added)
Poor Gnome and KDE dev teams.
It also does not surprise me that, on the same day, Gmail and the other Google Apps have dropped their “beta” status. You can’t sell Windows without Office.