Interesting read, thanks. I personally like the led look. I wonder if they will decease the power supply size accordingly to save some manufacturing dollars? That wouldn't be good thing. Maybe don't tell the stern bean counters! 

Doubt it very much.. main cost of producing a transformer is actually making it with the core and  different windings.. a few less windings on the lighting side aint going to make any difference... its only a few Watts or power we are talking about.. 6V @ 10Amps is only 60W... if every incandescent bulb was lit at the sametime, youd still only be talking around 40W max... in the scheme of things we are niggling over sheckles