If you watch the video carefully you can see the phone is pretty thick on its sides when folded.
A thinner foldable phone with a higher capacity battery like 6000mAh LiPo with 10GB RAM would be nice. BTW, 10GB RAM and above will be a trend to look out for.
Well......I'm preparing for such large foldable phone for year 2019.......maybe not a Sammy if someone can prove it's better than Sammy