I believe most people see CFL’s as a short term solution as a lighting source until solid state lighting (LED’s etc) reaches full maturity.
SSL lighting meets and exceeds the two advantages of CFL lighting you state above, that is efficiency and potential lifetime.
Efficiencies in SSL are still steadily increasing and prices will ‘steadily’ decrease as demand increases.
Harmonics can still be an issue but sensible driver circuits can largely overcome this. SSL’s are dimmable, non-toxic and more ‘rugged’ than any other light source. The question I have is how long before CFL lamps go the way of incandescents and are banned as well?. Would suggest it won’t be that long!