Real time search is not for researching a particular topic, that is what regular search is for. Real time search is used to find out what is happening in the world right now. For example, one day Pandora stopped playing music. I checked my connection and it was fine, then I went on twitter and searched for the word Pandora and BAM! 10 results saying Twitter is down and one results which said "Twitter was down, back up now." So I reload Pandora, and sure enough, it was working.
A second time, my wife was stuck in a traffic jam about 1pm. We thought it might be an accident, but weren't sure, so I searched twitter for the words "accident" along with her location, and BAM! Not only did I get tweets describing the accident, but also a link to an obscure, buried news report on it.
THAT is the beauty of real time search.