This is only a proof of concept demo of saturn's progressive scan mode, nothing more.
When I tried to find out how progressive scan mode works on Saturn, many "experts" argue that Sony CXD DAC it not able to display progressive signal, despite of this mode listed in the official Sega documentation.
In fact, according to cxd dac datasheet, RGB lines from VDP are not converted, DAC is only work for composites signals (NTSC, PAL), not component (RGB).
Therefore, you can use a standard VGA monitor for displaying a Saturn progressive scan mode. However, somes experiments are needed. Like PS2, this VGA signal does not use separate syncro like native VGA but composite syncro.
Seems pretty interesting..then...any retail Saturn can display that on a CRT 60Hz tv??
No, if your TV monitor does not support "P" mode you can't use progressive scan devices on it.
So you could play any game on the monitor, not only the progressive scan demo, right?
Yes, this monitor support interlaced and progressive mode, but on standard VGA 14'' monitor, tis demo works too, but not games.