I remember reading, at the time of the Nobel prize for physics going to the inventors of the blue LED, that a sizable chunk of the electric energy consumption (probably 30% but even if it was 15% it would be considerable) went into domestic and commercial lighting. Switching to LEDs, with their much higher efficiency, makes sense not only from an environmental point of view, but also from an economic point of view.
The technology has evolved to the point of giving a light that is much similar to the light of an incandescent bulb, but still I have to find a dimmable LED bulb that keeps that chromatic performance at low light levels. I bought the Philips with yellow phosphors that were touted as the best dimmable bulbs but when I turn down the dimmer the light is almost... grey. So, in a few rooms I still have my 100W incandescent bulbs - of which I bought quite a few before the disappeared from the local market. But there is no point in denying that LED technology is the best solution for home (and commercial, and industrial, and street) lighting.
As a matter of fact it's already a few years that I have converted those 30 - 50 grain LED light used for decoration into bottle lamps powered by 5V USB chargers. I use a constant current circuit made with two BJTs and two resistor (with a pot in case I want to regulate it finely) in the same topology as that used in the Dubai lamps, and they work just fine for ambient light and as reading lamps. The only downside is that with such low consumption (20-80 mA at 5V) the phone charger is working at a very low efficiency.