... So they're taller, tougher, stronger than the space marines you're familiar with...
So yeah, basically just bigger and better
I bet all the SM players love that their armies are now basically obsolete! - I have done some reading up and know SM will remain in 9th ed but with Primaris 2.0 now available who do GW think they're kidding?...
Anyhu, I for one really hope the good ol' Imperial Guard get an update in the new edition. That plastic Cadian set has been around FOREVER and whilst I know it's still infinitely usable I'd love for them to get some more refined, dynamic looking minis, maybe even introduce plastic sets (or upgrades) for some of the much loved older armies and not just Cadians, thinking along the lines of (new) Catachan, Valhallan, Tallarn, Mordian etc.
I'm all for the underdog in 40K, why collect an army of superhuman beefcakes genetically bred for war in a world full of evil and hate, when you could admire the courage and bravery of the soft squidgy bloke with a gun!? Up the Imperial Guard I say!