Samsung Galaxy S4 release date, news and rumours

I'm still trying to get back to the normal me, after having my hands on the Samsung Galaxy S3 and there were speculations doing the rounds on the internet that Samsung is planning to launch Galaxy S4 in March 2013. Well, I have to admit I really had goosebumps after hearing it for the first time. Instead of feeling relieved after using the Galaxy S3, I'm again starting to get all excited for the release of an official word by the Korean company about their next project concerning the smartphone. Various websites like techradar are releasing articles on the subject as if the news were true to the core, which are consequently making me even more anxious. Ofcourse if a phone as the one mentioned (S4), or atleast the news of it being true  is really released it would surely be better then its predecessor.