I didn’t say you could use arbitrary resolutions, I said you could change the resolution. I think it is you who is misunderstanding. CRT’s don’t scale, they change the number of pixels they show. If you show an 800 x 600 image on a CRT monitor, it will have 800 x 600 pixels. If you show an 800 x 600 image on an LCD, it will still have however many pixels the LCD has.
I didn’t say you could use arbitrary resolutions, I said you could change the resolution. I think it is you who is misunderstanding. CRT’s don’t scale, they change the number of pixels they show. If you show an 800 x 600 image on a CRT monitor, it will have 800 x 600 pixels. If you show an 800 x 600 image on an LCD, it will still have however many pixels the LCD has.