cambriaman wrote:
The 1/30 second or slower shutter speed was required because CRT (old style TVs) had the image painted by successive scans of a light beam which was interlaced to minimize smear. It took 1/60 of a second to paint the entire screen. Faster shutter speeds introduced black horizontal bars where the screen had faded from the previous scan.
Modern flat screen (LCD, LED, plasma and OLED) devices are a matrix of tiny receptors which do not require scanning.