I've used Merlin for a while and I'm still impressed by Merlin's sound identification, it continues to inspire me.

I wrote about it last year: https://digitalseams.com/blog/what-birdsong-and-backends-can...

Wow. I just tried it and it worked like magic. Thanks for mentioning that.

The sound and visual recognition around a lot of things is pretty impressive and I imagine it will work its way into less obstrusive AR in a lot of ways over time.