You probably won't see anything wrong in most cases. But if you have, let's say a demo with some smooth scrolling text, and watch it closely, you'll see that the movement is slightly uneven (regular, brief stops). IIRC Superfrog has some scrolling credits in the beginning where you can see this with the Indivision.
It's nothing I'd be worried about personally, but some people are more picky than others. Just saying that a perfect way of doing an arbitrary frame rate conversion has yet to be invented. Going to 100 Hz (PAL) or 120 Hz (NTSC) would be the best choice, as then you can just show each field twice without any stutter.