I asked an expert in the field of household appliances (my wife :P) what make of vacuum cleaner that was in the picture (I covered up the samsung logo). She immediately said, Dyson. Nice, more 'passing off' by Samsung.
The beta runs fine on iPhone 4/4S. Set it up as a new phone and do not restore any backup and you will have no battery issues. Most of he animations and transparencies are missing on the 4 but no surprise there to be honest.
For a first beta it runs super slick and fast on my iPhone 5. It was a bit jarring at first but after using it for a day I really love it. Going to see how we'll it runs on 4/4S at the weekend.
Looks MUCH better on my white 5 than on my black one though.