Samsung seems intent on dominating the mobile space, and they're doing a pretty good job so far.
They realize how important it will be to have a big footprint in mobile, and that if the industry follows what has happened in many other sectors, one player will end up dominating, and the others will be left with the crumbs.
IMHO, Samsung's biggest problem in the past was to simply ignore issues with it's devices, with the attitude of, "So the GPS doesn't work, we'll have a newer device out in a couple of months where it will." and simply buried the issue.
I think in the future, their problem will be covering the entire spectrum of mobile, by producing inexpensive devices that are not of the quality of the higher end devices, and risk brand quality erosion. If they can move their segment of the industry upscale a notch or two, they'll have it made.