No... this is still presented in 1080p bluray, but the scan from the original camera negative was done at 4k.
For what its worth, I would watch them in this order....
The good, the bad, the ugly
Fist full of dollars
For a few dollars more
Thats the correct sequence as good bad ugly is a prequel to the other two older movies, the yojimbo remake fist full of dollars and the ending "off into the sunset" movie few dollars more.