Roger Ebert Gets Star on Walk of Fame

Roger Ebert has found his way to a star on the Hollywood Walk of Fame. This doesn't surprise me because I would say the majority of people know who he is. I know I watch the movies that look good to me, but always hear others talking about the reviews. I wonder how many people read his reviews and actually go by what they say. Also, does this play a big role in the amount of tickets and movies sold?