Wow, I've had the non-LED version of this unit used on me many times over (cry), and it's exciting to see LED's make it into mainstream commercial (and in this case medical/dental) fields.
Realistically, the cordless curing tool is probably not going to be tremendously useful (or worth purchasing) for dentists in dental offices, as their non-LED curing unit is easily within reach of the dental chair, and replacement bulbs aren't that expensive.
BUT...
Imagine a curing tool that runs on batteries, and runs for a loooong time. Can you say field dentist? (Military, PeaceCore, etc...) I'm sure this will come as a pleasant surprise.
One small victory at a time... before you know it, we'll be joking to our grandkids how grandpa/ma had to change lightbulbs back in our day...