Some of the effects people seem to think crt = blurry but it isn't if you are using a decent hookup. But even with some shit hookup going into the cable plug in instead of S-Video or RCA type, you still probably wouldn't get that much blur unless your tv was particularly shitty.
The blur type that "adds fake detail" that people sometimes try to emulate is one that sends the R, G and B to slightly different areas incorrectly. I have one crt that does it particularly badly (pic). But I'm not saying this should be considered ideal or even that it's what a decent/average crt looks like. This is not a high quality crt. Still, appears to be what some are breaking their necks to achieve?