Theory of physics education, as well as our Journal of Baltic Science Education, made a significant step over the last 20 years. Twenty years ago, formal physics education had a one-and-a-half century of development; JBSE was just an idea to be turned into the 1st issue in 2002. In this article, I would like to mention some of the great steps physics education made in the last decades and some open questions for the nearest future. I would like to apologize to the readers from the field of biology, chemistry or primary science education - unlike in my previous articles in this Journal (Demkanin, 2013; Demkanin, 2018), here I focus on physics education.