That's certainly an impressive frequency, but it's far easier (relatively speaking) to construct an analogue amplifier for high frequencies than it is to, e.g., make a logic gate or counter that works at those frequencies - which would be necessary to build something like a CPU. So it's likely that even when/if this technology shows up in mass-produced analogue circuits, digital computers sequentially executing 1 tera-instructions-per-second are still a long way off.
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gain above 1 THz (1012 GHz)
one terahertz (1012 GHz)
lolwut? Are they trying to define 1THz = 1012GHz?
gain above 1 THz (1012 GHz)
However, in the first paragraph, I see
one terahertz (10^12 GHz)
Of course, one terahertz should be 10^12 Hz. So perhaps the author of the phys.org article got very confused.
Think of it this way: the speed they actually tested at was 1012 GHz. This is a speed above 1THz.