I watched this video by an interesting "non-dual" teacher named Bob Harwood that has been floating around the last couple of days at various places.
He seems like a very nice and sincere fellow, and he has had some profound experiences in meditation.
At the same time, the video also speaks of how this flavor of meditation and experience is rather unlike Shikantaza. Like but unlike.
If you watch the first 20 or 25 minutes (he really gets into the experiences after the first 10 minutes of introduction) you will hear of some of his experiences, with the emphasis on extra-ordinary arising of "cosmic consciousness", losing a sense of self identity, pure bliss, total oneness ... with an emphasis on staying that way. One must stay in a state of unity for extended periods that get us away from the ordinary experience of life. Separation and this life are an illusion we must get free from. The emphasis is on something real which lets us escape from the ordinary of this world.
In Shikantaza, we are so "non-dual" that we are totally whole, one and unbroken in times we feel "cosmic consciousness" and times we read a comic book, times when we lose our sense of self and times when we find it (and sometimes both at once), times of pure bliss and time of pure blah and times of pure blues (a Bliss that includes all bliss blues and blah ... i.e., life), total Oneness so One that it does not require us to feel "one" all the time. Rather than escape from this world, we run right into total unity with it. In Shikantaza, one is so "non-dual" that there is no "dual" or "non". Separation and this life are an illusion and thus as real as real can be ... and we are One and Whole even when feeling separate or feeling one and whole. The way to get "free" from life is to need to run no where at all. The emphasis is on something real found right in and beyond (not either/or) this very world ... thus we escape with no place in need of running.
The only thing to avoid is greed anger and ignorance (ignorance = feeling only separation and conflict and friction), because that makes a mess of suffering.
I don't know if that made things clearer ... or more of a muck.