Innovation is great. You know what it does? It solves problems. Not problems like 'What is beauty?' because that would fall within the purview of your conundrums of philosophy. Innovation solves practical problems. For instance, "How am I going to stop this big mean 5" 1080p display from tearing my battery and hand a structurally superfluous new behind?" The answer, according to HTC? Use a mini phone.
Let's give HTC at least one paragraph of fairness: the secondary mini-phone doesn't sound like the worst idea once you hear what it can do. It can take Bluetooth calls, pair via NFC, display notifications, act as a remote when your phone is plugged into your TV, and even help find your phone if, for some reason, you lose the big one but still have the little one in your pocket.