According to multiple sources, the sheer size of the whole map of New Vegas is going to be a hell of a lot bigger than the world map in 3. Unlike Fallout 3, where the third person view was awkward to use, In New Vegas, the camera angle has been changed to make the third person not only usable but preferable. As a result of this, there will be many more silly or funny outfits to be seen in third person.
Although New Vegas is not sequel to Fallout 3 and will not include any people or places remotely related to 3, It is more linked to the games before 3, due to the fact that Obsisian Entertainment are developing the game and many on the employees worked on the original game. So if you've played original games I will be a bit of a bonus, and you may spot some familiar names. One of the main things a lot of people are thinking about is whether New Vegas will live up to Fallout 3, as it was such an amazing game and a massive step up from the previous turn based games. In my opinion, I believe that It will in fact match the quality of the Fallout 3 or even exceed it.
A few websites and magazines have had a hands on play with Fallout New Vegas, by far, my favourite has to be the one my Machinima on Youtube, here it is:
There are also bonuses when you pre-order with certain websites, a list of these bonuses and website is here,
http://fallout.bethsoft.com/eng/home/preorder-fnv-uk.php
I hope you are as exited about Fallout New Vegas as I am, I recommend pre-ordering New Vegas right now and buying Fallout 3 Game of The Year to keep you occupied in the meantime. Links bellow.
Fallout: New Vegas (PS3)
Fallout: New Vegas (Xbox 360)
Fallout: New Vegas (PC DVD)
Fallout 3 - Game Of The Year Edition (PS3)
Fallout 3 - Game Of The Year Edition (Xbox 360)
Fallout 3 - Game Of The Year Edition (PC DVD)