Sony filed a “PlayStation TV” trademark back in 2006. The product in question never came out, but Sony has filed to trademark the name once again.
The “PlayStation TV” mark was Sony’s back in September 2006, but was left to expire until September 2012. Sony filed to trademark the name once again in June 2013.
Will Sony be developing some sort of TV element for the PS4 to compete with the Xbox One? It’s possible the “PlayStation TV” is an entirely new product that changes the way we watch television these days. We have all these smart TVs now that allow us to Skype and browse the internet etc.