SD? What is this SD you speak of?
When I do watch SD it looks pretty much the same as it ever did on my 26" LCD, moving to the 42" it gets to not looking so good and I pretty much refuse to tune into a SD channel on the 55". Compared to OTA and to me it pretty much a horse a piece. So, I am going with the scaling concept.
The problem I have with placing the blame on scaling is that if this technical description is correct, scaling should be a rather simple straightforward process that all to even the cheapest HD sets today shouldn't screw-up;
Thanks to TomCat for the tutorial info.