After reading this thread I am really surprised people are so confused by this concept. I thought the OP and sales did a pretty good job explaining the situation. In a 1 vs 1 comparison, if one of the consoles doesnt have a specific game/feature, it is a +1 for the console that does. You cant disregard a console for being able to play a game because "that thing over there thats not in the comparison" has it as well.
Most people that buy PCs don't consider if it will play games as a factor in buying it unless that's what they want to do with it, because they probably don't care to play games on them. The ones that have a PC as a viable gaming option purchased it for that reason, but you can't use that as a blanket argument for everyone with a PC. People buy consoles because it is a simple and dedicated way to play games. And in most cases PC isn't an option for them.