Even if I have a tough time imagining myself recommending Chrome computers to typical consumers as soon as the first half of 2011, I’m glad that they exist. The very existence of Chrome OS should encourage the development of sophisticated next-generation Web services that are better able to replace traditional software. By 2012 or 2013, pure cloud computing could feel far more tenable than it does right now — and if it does, the experiment known as Cr-48 will deserve some of the credit.