Well, YMMV, as they say :) Fair point, I suppose. But I'm a "optional opt-in" kinda guy, rather than "optional opt-out." It seems to me that many new features are more eye candy than practical improvements, and the above very definitely falls into that category for me, and apparently some others.
Steve Jobs' line that "People don't know what they want until you show it to them" may still have some merit, if what you're offering them really makes things easier/better and improves operational experience. But I'm "a bit older", having run Macs (and the odd Windaz machine) for... well... a long time, and anything I find distracting or annoying gets short shrift. But as long as we have the option of disabling it, I can cope.