Graphene is promising:

it is flexible, great conductor, and transparent BUT it is difficult to switch ON and OFF because of the zero band gap. It is considered a semimetal since there is little or no gap between the conductance band and valence band. If it is successful in the SemiConductor industry they will need to harness the Zero Band Gap, so they can make S/C devices. What about the optical side of things????

I am sure the yield for mass producing these graphene chips will be very low and many years off. In fact, graphene will not become prevalent until POET chips are approaching the 14 nm node level, and Taylor's law is coming to an end.

There can only be ONE!

for now and many years into the future.

POET.

IMO of course.