I've got a CRT too for anything retro. And that is the only way in my opinion. When you view a retro system on a modern screen you are not seeing the correct image in several ways. Firstly and most obviously is of course the colourbleed the CRT screens had, in the old days they had that in mind when they drew their graphics. Dithering would for example show up as a solid colour on a CRT television. In the kickstarter for the book The Bitmap Brothers: Universe which documents their history, they could only get permission to reproduce the graphics from Daniel Malone, the graphics artist, if they managed to reproduce them in the book exactly how they looked on a CRT screen. As he had been very conscious of the colour bleeding and had chosen his palette very carefully to make full use of it. And I know you all remember how slick the bitmap brother's games always looked.

But another thing most people aren't aware of is that the aspect ratio is never quite right on a modern screen. Because on a modern screen the pixels are perfectly square, while on old systems they are rectangular. On a CRT the pixels can be stretched however you want (remember those knobs on CRT monitors?) while the same is impossible on a modern display. You can get a close approximation by doubling the horizontal lines on a modern screen, but the image is still slightly squashed. In fact, to view an old game on a modern screen with square pixels in the correct aspect ratio the resolution has to be ridiculously high. But then you get the blocky result you always get with retro systems on modern screens. There is a great article about this on Gamasutra that is worth a read.

So no, the only way to use old systems is on an old CRT. Until someone can finally come up with a decent filter that properly emulates the way it's supposed to look on a modern screen that is. That's why I think modern projects like the Armiga and other similar projects that emulates retro systems for modern displays are great ideas, but not quite there yet.