You are right. It doesn't specifically state that this is in fact an ad. That is true. But it is kind of the same as if you see a popular brand in a movie. Not an actual ad, but has the same purpose.

Me, and a few people in comment section, just noticed that on this sub there's a sudden flow of appraisal for Apple products. After a 4th (I've seen only 4 so far) post in a short period of time it becomes a bit suspicious, don't you think? Considering the whole time of existence of Apple Watch, it is suspicious to me.