And this is what the guy had to say:

"I was taken aback with the claim that GaAs is a new way to replace Si for chip fabrication. It's been used since 1980s for chips, Si just happened to be cheaper and have more advantages than GaAs.

GaAs is still used today, and is found in solar cells. So it's puzzling to hear claims that this is somehow 'new'.

Now it is possible that they've found some new methods to improve the few inherent defects of GaAs and if so good for them, but their sales pitch would be more effective without the implication that this is revolutionary game changer - if their audience include anyone remotely familiar with the history of semiconductors, they would lose interest very quickly."

Anyone care to hit this person back with a comment??