I beg to differ. Deciding which control to remove is the essence of brilliant design and innovation. To paraphrase Einstein, good design is as simple as possible, and no simpler.
The iPod didn't allow you to manage files on your device, letting it be simpler than Creative's products. Yes, it also overcame a bunch of other barriers (physical interface, size, skipping, transfer speed, etc), but removing what everyone erroneously assumed was essential certainly contributed to their success. It's no surprise that the Nest guys are using the same playbook.