The act of hidden features in TV's

[lnx64]

So here's something I'm curious about. I have an SDTV here (digital, 2009 set with component input). It's badged as an SDTV, but it DOES accept 480p input, and displays it in progressive scan. So clearly it's an EDTV (Ironically the ATSC tuner spits out 480i, so that's really weird).

But how often did manufacturers do this? It seems like a wasted effort to claim something is less than it really is, considering how manufacturers like to lie about things and sell them as more than they really are.