Now India wants something that no global economic powerhouse should be without: an international symbol for its currency. http://news.bbc.co.uk/2/hi/uk_news/magazine/7923825.stm
And it's not as if the existing "Rs", "TL", "KSh" etc don't work. So by introducing a new symbol, the country creates a lot of real problems (not just in IT, but for everybody who needs to enter or display the new symbol; where's the " ₹" button on your keyboard?), just for a vague sense of nationalist pride and prestige.