I know of two languages which have made waves - Java and Ruby.
Java is created and marketed by Sun, a big company with a lot of marketing muscle. They also had something new, called Applets which were then the next big thing. Applets made it possible to put the same application on Netscape and on IE, and everyone wanted to use it.
Ruby has Rails in place of java applets. It was the cool new way to make web applications. It made it really easy to start developing and to prototype a web application. Rails is created and marketed by 37Signals, not as big a company as Sun, but still very good at marketing.
So here is what Perl needs
1. A breakthrough application
2. A company which is really good at marketing