The answer to your question is twofold. First, it is only your opinion that peoples' renderings are encompassing, etc., etc.. Even with this 935 image, you apparently like phones with camera lens bulges - I would never buy a phone that does not lay flat. Point being your idea of ideal and mine do not match but that does not make either right or wrong. That is a fundamental reality that companies need to address in design. Second, people who do such renderings generally have no experience in coding or device development. As such they have no idea of the real complexity of developing devices and OSs. No offense but they are just pretty pictures. Pondering why Microsoft just doesn't "do it xxxxxx way" completely ignores what is really involved.