The Eighth Doctor appears to have been given a new costume at a New Zealand convention. It consists of a blue buttoned coat, a man-bag and a very nice steampunk sonic screwdriver. I have to admit I wasn't too keen on the jacket - perhaps if it was velvet instead of leather. It does seem to have the "is it blue? is it black?" quality his old coat had and perhaps under professional lighting it might look better.
As it is a work in progress it looks okay - the sort of thing that Benedict Cumberbatch would wear on Sherlock. Put a waistcoat and a wing collared shirt on him and he still dresses like the Eighth Doctor - my only concern is the hair, or lack thereof. And don't get rid of the cravat - unless you replace it with a short scarf or some such!
Without a TV appearance making a new costume seems a little pointless - the Eighth Doctor had a distinctive costume that has been shown throughout the new series.
I doubt this is official - the video itself says it is the official unofficial unveiling of the new costume. Most likely it is the fans having fun in New Zealand. I doubt it will lead to a TV appearance.
Incidentally the Radio Times did something like this for Doctors 5-7 in 2003, as usual #8 was forgotten. This is him catching up I guess.