The BBC reports that a couple visible changes were made to ready QE2 for it's trip to South Africa where it will be used temporarily for a hotel.
To comply with maritime law, the homeport of Southampton had to be removed from the ship's stern, and the "Cunard" brand had to be removed from the sides to comply with the terms of sale from Cunard. The changes were required since it is being taken out to sea. They had been left there (and presumably restored once the ship returns home to Dubai) to preserve the authenticity of the ship as a museum.
The new owner, Nakheel, still plans to eventually convert QE2 into a hotel and entertainment center permanently moored at Dubai. The deployment to Cape Town is planned to last 18 months.