Finding the lab caches with an app is fine with me. Except I would like that app to be the same app as I use for geocaching (in my case Cachly) to prevent having to switch constantly from one app to the other and potentially miss other caches that you may pass.
I've found a couple of "lab cache trails" by now, as there are already quite some of them not too far from where I live. A trail made of only lab caches feels like it's missing something. I do however like the combination of a lab cache trail with a physical app for the start of the trail to explain the use / story that goes with the lab caches and a bonus cache at the end. In this way, the lab caches are used to create a kind of multi or multi-stage mystery cache, that feels far better than a trail without physical caches. The addition of a physical cache also makes it possible to add a written log and tell about your experience and add favourite points, something that a pure lab cache trail is missing due to the inability to add a log.
The lab cache app itself feels like it needs some more work. I don't find it very intuitive to use, and the navigation part is rather crude with just very basic course / range information, with no coordinates given (meaning you can't use a different app or device to find the cache). Also there is no way to replace the standard map with other more detailed maps. All these missing features are standard features with other geocaching apps. Adding lab caches to the standard geocaching API would allow for integration in other apps. It would make things so much easier for both developers of geocaching apps and for users of these apps.
But as far as the lab caches themselves go, I do feel that there is a future for them if they are better integrated in other apps and used as waypoints in multi- or mystery caches.