I think not - but perhaps I'm in a different position from some.
I think it's immensely good fun, and it takes great pictures, and, to be honest, I can live with it's quirks, there are plenty of work-arounds.
BUT
1. Manual focus doesn't
It's grotesquely slow to turn the wheel
you can't tell whether it's in focus using the optical viewfinder
if you're going to use the EVF, then why not use AF?
2. It's not really small
It doesn't fit in a pocket (at least, not in a summer pocket)
3. It's not very flexible
you can do close ups with it, but 35mm isn't really an ideal focal length
for other stuff 35mm might be the best focal length, but it isn't the only one
4. It's not weatherproof
The build quality may be great - but looking at the various doors and knobs, I wouldn't want to shoot it somewhere it was very dusty or likely to rain. Not a problem for street shooters, but not great if you're going walking (basically it's back to meaning you need a bag).
In the final analysis being fun and sexy isn't enough.
I love shooting it, but I'll always have the K5 along with me - as the X100 isn't small enough to go in a pocket it means I'll have a bag, in which case why not.
The low light is great, but so is the low light on the K5 . . .
The lens is just about good enough for landscape . . but actually, it's not really better than the K5, (I did a comparison between the X100 and the K5 with the 18-135 at 24mm and f5.6; the corners were a bit better on the Fuji, but as for the rest it was pretty much a dead heat).
. . . . . and it's nothing like as good as the M9. So, in the final analysis; If I'm going to carry a K5 and something else, then it'd better be a K5 and an M9.