UPDATE: As Sven points out, this could have been done to avoid any hurdles in the EU region but Samsung too, has applied for the Bada and Vita OS trademarks.
Going through recent trademark filings from Samsung, I discovered an interesting filing. A trademark by the name of “VITA OS” was filed by Samsung at the USPTO. Interestingly, this name was filed for registration a day after Samsung filed for Bada OS.
So what could Vita OS possibly be? If we speculate, it could be an altogether new OS, presumably for smartphones since bada is there for feature phones or could be that Samsung zeroed down on two names for their feature phone OS but decided to go with bada. Second guess sounds more reasonable but you never know.
A website Samsungvita.com is also registered under their name.
PS: If you know something about Vita that you can share, feel free to reach us. 😉