NHL Network seems to think so. They're broadcasting the entire 2013 Isles-Pens series today, twice. 8 am-8 pm, then again. They're also broadcasting Game 6 on its own twice more this weekend, so I'm thinking they consider it a defining moment of this year's Stanley Cup playoffs. Of course, they're also overloaded with Pens coverage all week, so they probably will treat this as a great Pens win instead of a watershed moment in the Isles development.