Erm... how is this a new OS? Linux always came with different window managers and browsers. Granted, many OSes (incl. proprietary ones) are based on open source kernels. But they would usually modify the kernel in a major way (or just call it a distribution, i.e., "Google Linux") - but in the press statement I don't read "on top of a highly modified Linux kernel". I hope for their sake that they made some revolutionary, meaningful changes to the kernel; otherwise they will just get ridiculed by their competitors as well as the open source community before long.