Complex sentence: The problem then becomes how to stream 1-2 megapixels of image data over a network at interactive frame rates, but commodity technologies (HDTV, to name one) already address this problem.
Split into simpler sentences: The problem then becomes how to stream 1-2 megapixels of image data over a network at interactive frame rates. But commodity technologies (HDTV, to name one) already exist to address this problem.