Ars Technica: Pokémon Go loses its luster, sheds more than 10 million users:

http://arstechnica.com/gaming/2016/08/pokemon-go-sheds-more-than-10m-users

Subtitle: Engagement, downloads, and time spent in the app are fading fast.

First line in the article: "Pokémon Go is starting to lose its buzz, with the latest tracking data seeming to suggest the game is simply a fad."

Can't say I'm surprised; Ingress seemed like a far more compelling concept.  Perhaps summer 2016 will be yet another "remember that time when..."

The article closes with:

Developer Niantic is persevering with the game, however, and is due to release version 0.35.0 for Android and 1.5.0 for iOS. According to the patch notes, players "will now be able to learn about a Pokémon’s attack and defence capabilities from their Team Leader to determine which of their Pokémon have the most potential for battle."

Niantic also hinted at upcoming developments designed to improve the game's questionable longevity, saying: "We are still working hard on several new and exciting features to come in the future of Pokémon Go."