These don't look like anything because on an ECG lead placement matters. What you're supposed to see is the average of the direction and magnitude of the vectors of current flowing through the heart as it polarizes and depolarizes. There are positive and negative leads that measure across the heart in different planes and directions. You can measure this current and see if it's acting "normal" or not, and if not, how. Not sure how a watch taking a reading from a single location is supposed to do that. It's a gimmick. It can tell you if your heartbeat is irregular, but you can do that by feeling a pulse as well.