If you include the rest of the sentence ...."because consideration has been given to the creation of a new and innovative category for the MCMHU." the reason for the slower progress becomes clear.
UL has recognized this technology as so new and promising that they are creating a entirely new category for MHUs. As a for profit company this is not something UL would undertake unless they saw this as an emerging field.
I take this as a disinterested third party validating the potential market impacts of the MHUs.