Sony wants to bring uniformity to its online services, so they’re switching your PSN account to an SEN One. This stands for Sony Entertainment Network. Yes, it doesn’t have the same ring as PSN or PlayStation Network. But don’t panic–this change is strictly cosmetic. You won’t have to do anything, and PSN will basically remain unchanged. Here’s a prediction, the next PlayStation won’t be called a PS4, it’ll be known as SEH (Sony Entertainment Hub).
Source: NeoGaf