While "more efficiency" is a good thing, I find myself wondering how much the average efficiency of small motors will actually be increased by this, and what the side effects will be. Generally speaking "increased efficiency" translates to "costs more up front" so I suspect we can expect the prices of tools using "general purpose motors" to go up.
Can the Chinese meet the new standards? If not then this might be a defacto ban on Chinese motors, which would be good for American motor manufacturers but also mean price increases on all sorts of things.
Then there's a little detail--"Run capacitor provides winding with increased energy to help improve efficiency". I don't know if that's specific to Dayton or if it's across the board--if so, if all new general purpose motors are required to be capacitor-run, then we can expect to have to replace those capacitors with some regularity.