Hyundai reps have mentioned several times that the styling was the main focus. After that would be the intended functionality.
This is what I think we could see in production:
-Wheels, tires, and fender opening will get 2-3 inches smaller. The concept has 22s. With the Tucson getting optional 19" wheels there is a good chance that the SC could get up to 20s to keep with that focus on styling.
-The cab will be extended behind the B-pillar/front door to make more room for the back seat. The suicide doors can stay. When you look at something like the BMW i3 they are very doable.
-The busy styling on the side will smooth out some. That door vent (its not even a fender vent and makes no sense) will go away.
-The headlights will have lenses that are flush with the body. The foglights can keep the same general shape, but will also be made more flush since right now they're huge air scoops - not good for aero.
-All the yellow will go away. Side mirrors will be black or body colored and normal sized.
-"Hoping" the tie-downs make it, but are optional. The separate plastic fenders make that possible.
-The extending bed is doable. I've done some patent research and there's many designs out there. Hyundai has a few patents on it. I think it can make it as an option. Add on the extending bed with a fold out extender and you get a pretty substantial bed. The tail lights will be the tricky part since with the tailgate down on the concept, the tail lights are not visible, and legally they need to be. They could make it like a traditional tailgate where the tailgate is only in the middle and the lights on each side will stay fixed on the end of the extending mechanism. The parting line through the lights would be similar to on the Tucson but the tailgate would obviously open in the other direction.
Other than that, its pretty production ready.
Wish I had photoshopping skills..