Hope for a free alternative to Scopus or WoK ? Will this only be a metrics tool ? If that’s the case, I don’t really care…. What they (Google and MS) need is to improve the accuracy of their database and search tools; I have always found Scopus to be far more accurate and relevant than Google Scholar, so far. I’m curious to see how it evolves.
I was not aware of the Microsoft Academic Search. Materials science is not covered yet, alas.