Samsung is now rumored to have a completely new type of Galaxy Bud in the works. According to a new leak, they will have a much larger shape that looks somewhat like a pair of beans. Some renders generated based on this idea suggests that they may have an improved range of sensors compared to the Buds+.
https://www.notebookcheck.net/Samsung-has-developed-a-new-kidney-bean-shaped-Galaxy-Bud.459948.0.html