Well I've just debunked that the whole console is 4 times more powerful in total, but still you math is off.
X1 = 1.31 teraflops
Yeah it can't be 4x the gpu power, Titan RTX is 16 teraflops.
Just looking at the GPU flops
Scarlet in 2020 will be ?
Titan X was 6.7 tflops in August 2016, somehow MS managed to get 6 tflops in the xbox one X for release end of 2017 for $499
1.5x faster than the RTX in a console in 1.5 years is out of the question. But 2x the XBox One X is very do-able, 2x the CPU, 2 + 2 = 4.