What do you think?
For Bitcoin miner,I believe 1T is mining ABC,so looking forward to 5T or more powerful miners outcome.
The hashrate as a standalone number is generally irrelevant when determining the "value" of a miner.
The primary variable to take into consideration is how efficient a machine is in terms of electric consumption. As since the difficulty generally increases at an exponential rate the longer a miner is in use, the less bitcoin it will produce and you will want it to produce more bitcoin then it consumes in electricity (in terms of fiat).
The next variable is it's hashrate verses the hashrate of the total network. A year ago a 333 MH/s USB miner would be considered extremely fast and was well sought after, today any miner under 200 GH/s (~600x as fast as the 333 MH/s) is generally considered obsolete.