http://home.att.net/~rfowkes1/ComponentVideoSwitching.html
Some might say that "more is better", but in this case it simply isn't true. We've consulted with a number respected engineers in the HDTV world, and they all agree that 40 or 50 MHz in the analog connection of HDTV signals is all that you need to want. Wider bandwidth in these connections may subject the system to possible RFI/EMI interference from a variety of sources. In other words, you'd find that you have "too much of a good thing". In audio there are some who say that wide bandwidth is appropriate, but in video all you will do is run the risk of having to deal in intrusion from a variety of unwanted signals.
The conclusion: Sure, we could easily design a switching system with 50, 100 or 200 MHz bandwidth, but there is no reason to do so. Spending money on components that deliver no perceptible benefit just to claim a higher figure than internationally recognized standards call for is just silly
