So the primary purpose of an HDMI splitter is two take a source and split it to two different displays, correct? My question is, can this work the other way? Take two sources and output them to one display? Let me elaborate. My parents have an older 32" 720p Samsung with only 2 HDMI ports. They have a cable box hooked up to 1. And my smart-ass buys them a blu-ray player and a Roku this Christmas. I'm wondering if I can hook up the blu ray player and the roku to the splitter and plug that into the last remaining HDMI port. My hope is that as log as 1 device is on and the other is off, it should work. But I have doubts. I think what I need is an HDMI switch correct?