Yes it will & Father Christmas will come but only if you've been good!
The Oriana is a ship NOT a boat. A boat is something that comes to pick you up should your ship 'GO DOWN'. The answer to your main question is 'YES' they decorate the SHIP beautifully a few weeks prior to Christmas. You should enjoy CHRISTMAS on the Oriana.
You could even push the "boat out" (or maybe push the ship out) and have a bottle of bubbly to celibrate.
Ps - The word boat is also used to describe submarines, but I aint that picky on descriptions.
Well i have heard that p & o will have the decorators in prior to xmas , paint colours not known at this time .
We are on the same cruise I have started to buy small decorations for the cabin and am now looking for something to go on the cabin door. Go on to P & O Community there is a thread on for people on the Xmas Oriana cruise.