What are you talking about? I have a 3rd grader who attends a school using common core. Last year they spent a ton of time working on rote memorization of basic single and two-digit addition, subtraction, multiplication, and division problems. Every week they took four tests (100 problems, five minutes each) covering these functions and I helped grade the papers. By the end of the year the average kid got 90+ correct on addition, 80+ correct on subtraction, and 50ish on multiplication and division. Perhaps my child's school is different, but it sure seemed like they devoted a ton of time to rote memorization of these facts last year. This year my child is quickly performing addition and subtraction of three and four digit numbers.
I hear all the complaints about Common Core, but what I hear vs. what I see from my child don't line up. It doesn't look all that different than what I recall learning as a pupil. I certainly haven't seen any 2+2 = 5 nonsense. My only complaint so far is there seems to be less emphasis on subjects beyond math and reading than I'd like. Maybe it's different elsewhere, or in higher grades, but my direct experience has left little to complain about so far.
Doctors are already piloting this for use in surgery.
It's early yet. The rules for acceptable use and functionality are not yet developed, but they will be. The concept of a hands free heads-up display has too many practical uses for it to die off as a fad. This isn't going away.
Those who can, do; those who can't, simulate.