[old_tv_nut]

Excellent!

The pattern creates artificial high spatial frequencies (sharp differences between adjacent pixels) (aliasing) that are not in the source, so there is an impression of sharpness, but it's due to false detail that sometimes falls symmetrically about an edge and sometimes distorts the position of the edge. So, it is both sharper and distorted. The fact that it's a grid pattern and is finer than detail in the original, apparently prevents it from forming obvious jaggies, but it really is just another form of artifact.