Rendering is the final process in which the raw footage is either turned to Ntsc Dv/Widescreen/SD or Pal/Ws/ SD so the video will be compatibly suited with varied TV codec acceptance signal. Unless you play the raw footage (AVI) through windows media player or Mac, then there is no need to convert the footage. The negative side is the format race of Av giants might render the old format useless as time progresses. To overcome it,you have to keep up with the trends by updating the video codecs. It is like saving current p/point document to windows 97. Open it again may result in lost of certain features (97 format). This happens as technology is progressing although the trend does show redundancy. Obsolete program compatibility offer is just a courtesy move by the software giants in order not to lose fan base.
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