People put so much hope behind suggestions for a redesign because they really hope that we get one, because they feel like Apple is falling behind in design, and because they think we are on the cusp of getting the best looking, best notebook computer ever from Apple...something that will be completely different and completely new.
Sometimes I'm not sure what people want Apple to do, though. When it comes to the MacBook Pro, there is only so much they can do these days, isn't there? As they say, there are only so many ways to skin a cat. What kind of things can Apple do? No matter what they decide to do with the Apple logo (mirrored vs illuminated) or the keyboard, or the ports, etc. it's still going to be a clamshell notebook. There is nothing particularly interesting or innovative about a traditional notebook computer anymore.
The MacBook Air was innovative, but that was because it's thinner and lighter and jettisoned legacy technology that was fading away. But, lots of people would argue that Apple's computers (and other manufacturers PC's as well) are thin and light enough, in fact, they might be getting too thin and light. And there is really no more legacy stuff to do away with in favor of a far more modern concept.
A significant number of people on this forum, for some reason, are having a gigantic circle jerk over Dell's XPS line and are holding it up as a prime example of great design and fantastic innovation. Well okay, if it's what you like, then great! But it's nothing really special in the grand scheme of things. What's innovative about it? For starters, because of the InfinityEdge display, the bezels and their contents are all kinds of screwed up. The side and top bezels are super thin, but the bottom bezel is super chunky because, among other things, it has to hold the webcam. A webcam in the bottom of the display? Really? Design isn't just how it looks, it's how it works. And putting in a NostrilCam is a horrible design choice. Apple is always lambasted for even the most minute form over function design choices, so why not Dell? Many seem to want an InfinityEdge display, but they don't take into consideration the downsides. Apple is definitely not going to do this, not only because it's an extremely bad design choice, but because they won't be able to get away with it unlike Dell (and they definitely shouldn't be able to!).
There is also the HP Spectre that people went gaga over about a month ago, but that's not a MacBook Pro level machine and is way too blingy for Apple anyways. There are also products like the Surface Book, but Apple isn't going to go that route as far as we know.
The MacBook Pro is definitely going to remain a traditional, non-hybrid notebook. So, what kind of mind blowing innovation are people expecting here with regards to a redesign? Sometimes I don't think people live in reality. I don't think there is much they can do at this point besides adding some of the key characteristics of the MacBook like the all aluminum hinge, for instance, or maybe a far nicer display that might support TrueTone. There is not going to be a mind blowing next-gen MacBook Pro. I'd argue that the design will be refreshed for sure, but it's not going to meet a lot of people's expectations, because they think we are going to be treated to this mind blowingly awesome computer handed down to us from the gods.
Just because other manufacturers have finally gotten off their behinds and stepped it up in regards to design; just because they've started offering machines that look nicer than the bland uninspiring things they were traditionally known for, doesn't mean that Apple is suddenly phoning it home. Please note that I only disagree with the phoning it home comments with respect to the MacBook Pro design, not other aspects. Because how they are treating the Mac Pro is a shame, and the Mac itself needs attention pronto.
The reason that the iPod Touches aren't updated much anymore is because few people buy them and they don't really make much sense anymore. The iPhone 6SS seems like it might only because they are working towards a complete redesign and it won't be ready this September, not because Apple doesn't care anymore.