Aside from the fact it's gorgeous, it's also slightly larger than CK2's map. You can now reach a little bit further east and Africa seems to have more counties and go southward.So this is apparently the entire map of CK3
I'm very excited to see the new culture mechanics and the culture dev diaries.So there are interviews happening or being released now and one of the things being mentioned is the new Tech system. It is so much better and flavorful.
"Technology in Crusader Kings III is based around individual innovations split between different eras that trigger with set years. These can differ from culture to culture and range from ones unlocking new types of buildings or men-at-arms, to granting new succession types or increasing your ruler’s domain limit. Contact with other cultures can speed up the acquisition of certain innovations while the Cultural head – the ruler holding the most counties of a given culture – can also designate one Innovation as that culture’s Fascination, greatly reducing the time it takes to unlock it. Overall, the new approach to this system feels much more involved and lets you better target specific improvements for your realm, the long unlock time adding extra weight to your decisions".