If they were what claim they are, this is just as absurd as field replaceable LCD back light.
On DLP and projectors, the lamp is field replaceable because it's considered a consumable.
From what marketing sings, given the life of LEDs they claim they're supposed to be good for the life of fixture. But then, from what they claim, its as absurd as lifetime warranty brake pads,where they'll pay for the parts, but you're on your own for the cost of labor.
I doubt LEDs will get standardized as LED elements are part of an engineered LED fixture that define the characters of the fixture like the engine in a car.
You're not going to see cars with standardized mount interchangeable engines the same way motors are with common frame either.