I make tensioned structures, currently a Tarp, and in checking the description of the Dyneema X see that there is a claim each Dyneema thread is capable of an incredible 150 lbs tensile strength ! 

That does NOT square with a straightforward check, using the full 3.6 oz of fabric weight/yd^2 (assume the PU is 10%) and assign it (all/only) to the 4 Dyneema cords each in warp & weft directions per inch— you will see that only then could each Dyneema thread be even close to that strong !  There is thus about an 10X+ overstatement, each actual Dyneema thread is more likely capable of <15 lbs stress since indeed the cloth is 90% nylon & 10% Dyneema (would seem someone at the mill, perhaps the overambitious marketeers, added an extra zero somehow.)

Indeed nearer 10 lbs max would be more likely, even if this cloth were woven with the highest ‘75’ grade of Dyneema thread. 

This is still a very strong and useful fabric.