My niece is always looking toward the next thing. She could be in middle of a really fun activity, but then begins to badger me with, "What are we doing next?"
I get annoyed (reasonably, don't you think?) as she is pushing aside the pleasantness of the present by fretting about the future. She would benefit from some "mindfulness" training.
Yet what if someone is in middle of a really unfun activity, like vacuuming or scrubbing the bathroom? Is "mindfulness" really to her advantage? Is "being in the moment" going to make her happier while pre-treating laundry? Wouldn't day-dreaming be more beneficial, if not more likely to provide a "Eureka!" moment?
Ruth Whippman attacks the "mindfulness" movement by pointing out that it is a uniquely human ability to think outside the present. She is also irritated by the self-help movement that promotes it, as they seem to claim that there is no problem that cannot be rethought in a more glowing light, rather than finding a solution that problem.

However, I think "being in the moment" has its place. Like instructing my niece that she should flipping enjoy what she's doing now, or else we'll never do anything fun together ever again, got it, sweetie? *Cough*
Also, there is beauty in everyday life that can be overlooked when we don't pay attention. When doing a neutral activity, like taking a walk. There are interesting scenes to witness, as long as we aren't busy texting.
Whereas, there are difficult times in life when floating through unreality is a lifesaver.