The scientific method demands replication, and we've talked an awful lot about papers being published that can't be reproduced.
When it has been replicated it's theoretical science. But it's still a variant on the XKCD joke about how everything (including guns) kills cancer in vitro but that doesn't mean you can use it to cure cancer.
Lab-only experiment might clue the next person into a phenomenon that can make it out of the lab. But making it news when it hits the scientific journals has been a sore subject for a lot of people, and seems like it always will be, and that it might even get worse before it gets better. We call a lot of things 'science' that haven't followed the scientific method, and it's exasperating.
This is not the first time materials sciences people at UIUC have looked at self-healing materials. Twenty+ years ago they were looking at lacing concrete to repair small cracks. Really cool stuff... that has not made it out of the lab as far as I'm aware.