The main problem with STANDARD TV is resolution.

This is determined by the number of pixels on the screen. Our TVs display 625 (576 active) lines vertically and have a theoretical bandwidth of 5.5 Mhz (in practice 3.5 to 4 Mhz), all in interlaced scanning.

The computer world has accustomed us to a higher resolution image, because while the starting point (VGA) was 640×480 (= NTSC 525 lines), we very quickly moved on to SVGA and XGA with current resolutions of 800×600, 1024×768, 1280×960, 1280×1024, 1400×1050….and progressive scanning.