I dunno, the Home Depot (large consumer-grade
hardware store chain in
the US), as of my trip there yesterday, carries quite a wide variety of
LED-based incandescent replacements.
The ones I've seen over here are very low power consumption (<2W) but
also very dim. They may well be efficient, but you'd need about 10 of the
replacement 'bulbs' instead of a filament bulb in the average room. Which
makes them look a lot less attractive to me.
-tony