I agree, except that I actually enjoyed Super 8 more than Star Trek. Both Empire and Jedi made less money than A New Hope yet many people call one of them their favorite. I think that the only reason that ROTS made more than AOTC is that most believed that it was going to be the last Star Was movie ever but TPM made more than both of them and that was the Jar Jar Binks show. The top 10 highest grossing movies of all time in the USA (with the exception of Titanic and Avatar) have been released in the past 10 years but I don't believe that the greatest movies of all time have been made in the last 10 years.
(though if you Adjust for ticket price inflation only one movie (Titanic) in the top ten highest grossing movies in the USA was made after 1982)