The 12 mm is already pretty good, no?

As usual the real story is more than marketing words. High modulus means stiffer. As a generalisation, intermediate modulus carbon grades are stronger (higher tensile strength and resistance to impact / cracking).
You get stiffer with HM / UHM (that's all modulus is - a measure of elasticity) but the other physical properties may not be better. So by the time we make thinner to reduce drag and use the trendy UHM, its not necessarily better in an all-round sense.

Leona82 said..
Someone takes a measurement about the
'bigger cord' of 12mm. I saw 12 and 14 mast close each other and I don't get any difference in cord. For sure I need some accurate instrument job. Anybody did it? How mm difference?

I'm quite sure both are 120 mm for the majority of mast, the 12 mm is slightly wider towards the base, slightly below 130 mm IIRC. This is pretty standard for masts the last couple of years, compared to most other brands having skinny masts with a chord length of
~100-105 mm.

Leona82 said..
Someone takes a measurement about the
'bigger cord' of 12mm. I saw 12 and 14 mast close each other and I don't get any difference in cord. For sure I need some accurate instrument job. Anybody did it? How mm difference?

The 12mm is about a cm wider in chord than the 14mm across the entire length. Its quite an obvious difference when you have the masts side by side. I feel the 12mm and 14mm UHM are quite close personally and I'm quite confident I'm at the top 5-10% in terms of skill level. Even the difference compared to the 16mm carbon mast isnt anything massive and anyone would be happy with any of the carbon masts. Im happy riding any of them and alternate 16mm, 14mm HM and 14mm UHM regularly.

Re the topic: I havent seen or heard anything yet. Dont expect much news to come out until March if anything is coming.

There was a picture on progression forum from AWSI of an F one mast on a RIIFT board with a tapered mast and narrow chord, so at least it seems they are experimenting with it.