Identified the target correctly for the most part, then missed it.
Fatal flaw in their logic is the comment about people carrying tablets and laptops around together and wanting one device that could do both. Hence you need a desktop environment and the tile environment and that is where they fell off the horse, because that mishmash is why people hate it, because it does neither well. What they should have done is had some sort of setting that could lock it into desktop mode with a traditional start menu for people who aren't into tablets. And Windows RT is an even bigger joke, because the desktop mode is largely useless, they should have just not had it in the RT version.