I have to say that hellenic-stay frame that Chombi posted, well, that is a good looking frame. The parallel down tube and seat stays gives it something special.

But I agree in principal with the point made. All bikes with a horizontal top tube diamond frame and drop bars pretty much look the same. Add racks and fenders and stuff, you can change them a little... but not that much really.

Just a couple weeks ago I was out riding a century (116 miles actually) on my Fothergill, which is from the 40's:

and I passed this car for sale:

And it struck me, the bike is probably older than the car, but it's gone far more miles today than that car has, and it looks pretty modern to me. While that Packard, well, it looks pretty archaic. And though I don't know exactly how old either one is, they could both be from 1948.
Don't get me wrong, I'm not scoffing at a 1948 Packard. Very cool car. But my bike gets more use!