In the old PAL/NTSC days we already had 48/50 FPS in terms of refresh rate. In fact those were only half frames, toggling between displaying only even and only odd line numbers. In fact this was very clever. Horizontal movement looked fluent but had a lower resolution but the latter disadvantage was not very noticeable because of fast movement, where fps matters. Still pics or slow movement provided more detail (24/25 full res pics per second). There was a rather long time of analog/digital transition era where I liked analog better.