You didn't really need all that modern supercomputer power
One of the beliefs of climate change doubters is that computer simulations conducted decades ago didn't accurately predict current warming, so the public should be wary of the predictive power of newer models. However, it turns out that they did predict current temperatures as early as 50 years ago.
Not ready for 2020
Fujitsu's ARM-powered supercomputer, the Post-K, is not going to be ready for 2020 as planned.
Need to beat the Chinese
The US is clearly embarrassed the Chinese Sunway TiahuLight system is leading the supercomputer arms race. Now the Department of Energy’s (DOE) Oak Ridge National Laboratory has announced that is having a new IBM system, named Summit, delivered in early 2018 that will now be capable of 200 peak petaflops.
14nm process with 3D Tri-Gate transistors
Intel has started sending out its Knight's Landing version of Xeon Phi and this one has a 72-core coprocessor solution manufactured on a 14nm process using shiny new 3D Tri-Gate transistors.