Many modern TV no longer has component input. Those that do often share the same input with a composite input. It is rare to see a TV with more than 1 component input.I'm talking about supporting component. However, I believe a lot of people have more than one TV in their house, but only one which is an HDTV. It sucks that they won't be able to move them around.
I imagine that almost everyone interested in the PS4/X1 will have HDTV's, but it still sucks having less support.
Ever since US converted to digital broadcast back in 2009 component has saw its decline use. By 2015 even the low power broadcast will goes away, at which point TV manufacturers will no longer have any reason to add analog decoder to their TV. By then TV is 100% digital only.