I'd be lying if I said that the grain looks entirely normal though, it seems a fraction sluggish and it reminds me a hell of a lot of Fox's treatment of Alien on UHD: if you start watching the outlines of people and objects you'll see the grain warping and trailing behind them, though it isn't like the DNR on the MCU movies which tends to smooth most of the grain away and only leaves behind an isolated 'forcefield' of noise whenever things move.
The rest of the film is nowhere near as grainy as this opening and yet there's always an ever-present layer of the stuff helping to add texture. Right from the start I was digging the UHD as there's a very prominent level of grain in the black and white prologue, even more so in the 'flashback' to Bond fighting the fella in the bathroom which was pumped up in the DI to look insanely gritty, and way more contrasty than the accompanying office scene. This is going to be the really really really really long version.