The hardest movie ticket to get this weekend was for a film audiences have been able to watch at home for years: Christopher Nolan’s “Interstellar.” The science fiction epic starring Matthew McConaughey and Anne Hathaway earned $4.5 million from only 166 screens in the U.S. and Canada. Its 70mm IMAX film presentations sold out in minutes, leaving theaters scrambling to add more and people paying up to $300 on the re-sale market. Those 10 film screens alone had a staggering $70,000 per theater average, one of the highest of the year and usually the bragging rights of acclaimed arthouse movies playing on only four screens.