You understand that we're talking about iMac, right? What's the point of iMac if you were to link all those external devices to it? It sounds messy. I love the fact that there is only power code going into my iMac; clean, minimal, has everything I need in one piece.
If history's taught us one thing about Apple products it's that they'll happily ditch old technology if they think it's not necessary, then occasionally sell it to you as a wired accessory. It's becoming increasingly obvious Apple will ditch optical drives completely, 2 of their 5 Mac products have already done so and Apple no longer use discs to distribute software. if I were you I'd clear some spare on your desk