Samsung has a big job on its hands to create a new Galaxy smartphone that makes the masses go out and buy it. Just like the problems Apple has with the iPhone, with success comes an unrealistic expectation of greatness which each new phone that is released in a successful series.
The iPhone 4S was considered by many to be an incremental update and indeed it was. With the same design, a better camera, faster processor and Siri, there was little to make people upgrade from the already substantial iPhone 4. The Galaxy S II is still up there with the very best smartphones available today and so Samsung has to pull something out of the bag to keep the momentum going strong.
We should expect a redesign and maybe a phone that is even slimmer than the previous model. Better screen technology is a possibility and of course more RAM, a faster processor, better camera, more storage space and what else?
Besides the obvious upgrades mentioned above, it is difficult to imagine what else Samsung could come up with apart from something we have never seen before. If the S III has better everything than was there before, it will be magnificent, but still not likely to excite the masses. It will need a feature that is either completely new or that does something in a different way to what we have seen previously. We await the launch with baited breath.