Okey so it looks like that the OMEN 15-en0029nr (Ryzen 7 4800H, GeForce GTX 1660 Ti, 2×8 GB, 512 GB, FHD, IPS, 144 Hz) will be right choice for now, at least to bridge one to two years and hopefully there will be more 16:10 or 3:2 options available. The ZenBook Pro Duo is a concept which i really like but Gen1 has to many issues and is a bit on the heavy side maybe Gen2 or Gen3.
The ProArt wouldn't have been an option, way too expensive and had to much compromises for me.
Anyway, thank you for you help and maybe till next year