The two reasons you provide (friction and immersion) are part of why the voice interface is the next big thing — and why Apple is at a structural competitive disadvantage:
Why the Cloud and Privacy Put Apple at a Structural Disadvantage
Data is king as devices get abstracted-away…
Adventures in Consumer Technology
While the article above discusses Apple and AR, the following delves deeper into wearable, the voice interface, and disruption:
Of course, the free and open web is prone to beg, borrow, and steal your attention. Reading blogs, news, and research has always been an inefficient user experience — like finding needles in haystacks — but now Annotote is the antidote, so check it out: Don’t waste time or attention; get straight to the point.