This discovery might be interesting for Bitcoin and crypto miners. There is a thing called merged mining and SMHT might make it more profitable.
I'm not sure why you are bringing up merged mining, but in general, improvements to computer processing power and efficiency do not affect overall profitably. They only increase the difficulty.
Merged mining allows you to mine more than one currency without compromising on computational performance, am I wrong? So, this new technology allows the tasks to run simultaneously across multiple processors. Not the best parallel but I thought I had to include it.
Actually, you are right, it's only going to increase difficulty but it's always increasing and more powerful miners always bring a better profit.
It's also going to be interesting to see if SHMT could have a negative impact on the lifespan of computer hardware. Perhaps the increase in speed also shortens the life of the chips.
It uses 51% less power, so it shouldn't negatively affect its lifespan. The benefit of SHMT is that it can reduce carbon emission and computer hardware costs.