With small cars, the added cost and weight of an auto box is probably not going to be very popular.
Additionally, engines are getting ever smaller in the lower segments, so auto boxes will suck away what little horsepower there is.
In anything 1.6L upwards, I can see the autos taking over, hell even 1.4s if they're properly charged. But the 1.2s, 1.0s and below? It might happen, but I am less optimistic.
Also, a note of preference: With a manual box, you can anticipate traffic way better, than with most auto boxes. Being in the right gear at the right time can save some split seconds, when pulling out for an overtake, especially in turbo cars, where you've not only got to wake the turbo, but also wait for the downshift. If you're already in the lower gear, the increased engine rpm already generates more exhaust, so boost is on tap, and overtaking much swifter. Same for peaky petrols, where you have to hit 4k rpm first, and then pull out. With an auto, there's always that hard-to-judge delay, between pushing the pedal, and pulling out....
But, having recently driven a car with a relatively hard clutch, I understand how it can be a pain in the ass. On the other hand, the feather light clutch on my Swift is a dream to drive, and I wouldn't want any kind of auto to take away the engagement and enjoyment.