"Although this is a very simple idea and an even simpler change, we're excited about it — because it symbolizes our focus on search and because it makes our clean, minimalist homepage even easier and more fun to use. The new, larger Google search box features larger text when you type so you can see your query more clearly. It also uses a larger text size for the suggestions below the search box, making it easier to select one of the possible refinements."
A very interesting change indeed. Wonder what they are going to think of next. Well check it out on www.google.com