• New textures
• New lumen global lighting system
• Enhanced DONG slider (it now increases your girth as well)
• New UI
• Automatic pull from chests crafting/building
• Corner pillars
• Exile Lands and Siptah are now on the same map and you travel between them (If you own the Siptah expansion pack)
• Multiple character slots / Solo world saves

You can read more about it all here: Conan Blog Entry
And also here: Conan Website Enhanced Page

There are videos in the links and also on the Steam Page.

As of the time of writing this, 865 mods have been converted over to work with the new engine - which does include Devious Desires (the sex mod). There is a big patch landing on June 9th which is probably going to change item serialization to make converting mods easier so most mods will probably have to be updated for that BUT more mods should be converting over after that update hopefully.

I've been playing it and for me it's been very fun and stable.

-edit- Oh! it's PC only for now. Officially they have not ruled out updating the console versions; but realistically the console generation the game launched on (ps4 and xbone) cannot handle Unreal 5, so I personally wouldn't expect it to happen.