Scientific American published an article on its website under the title “Why Tau Trumps Pi“. The author explains why some mathematicians argue that “Pi is a confusing and unnatural choice for the circle constant“, and why they propose to use “Tau” (the greek letter τ with a value of 2π).
The debate is interesting for anyone interested in mathematics; but I doubt that change proposed – to drop the use of π and use τ instead – will come soon. As noted by one of the commenters on the article:
The U.S. Congress passed the Metric Conversion Act in 1975, declaring the metric system “the preferred system of weights and measures for United States trade and commerce.”
We’re still waiting for that transition to happen in the USA – so in the meantime I’ll remember τ and I’ll keep calculating with π, since that’s how I learned it. Besides: match without Pi would be a lot less tasty.