We already covered the numbers from Netflix's impressive earnings call this past Monday, but there was another story lurking in there too; a potential sign of the coming apocalypse for physical media. The company is reporting that many of its customers are substituting mailed movies for streamed ones, taxing the USPS less and their broadband connections more. CEO Reed Hastings is playing coy about whether this is a strong trend or just the curious behavior of early adopters, and since his company gets paid either wa