I think it may be because of lack of superstars that Pakistani industry had. They don't have mega stars like Khans of India by whoms name a film can be promoted. This means they had lack of mediums that can create buzz, hype and give a good quality release to their movies. Their some movie are no doubt excellent in content but their appriciation is restricted to a small group of people like we only, who tend to search quality movies, not to wait for content to come to use. Moreover, film industry in Pakistan is in growing stage, if they keep on making movies like Waar and Bol then I am sure that one day will come when exibitors from India will themselves request the producers of any big Pakistani movie to release their movie in India too.