My $0.02 worth.
Considering that an incandescent lamp loses 94% of it's output as heat, it should be only a short period of time before it's demise, colour-rendering or not.
LED technology is advancing in leaps and bounds and has been in the last 5-10 years as opposed to the development of the filament lamp since it was invented, in the 20th Century.
Most of what is driving industry these days is finding a better, low power alternative to the light bulb.
With singular LED outputs in the thousands of milli-candelas and with such a low current, it will be a short amount of time before the incandescent source is made obsolete.
Couple that with the 300,000 hour life on an LED fitting.
Take your pick.
