NVIDIA Releases JTX1 ARM Board That Competes With Intel's Skylake i7-6700K (phoronix.com)
An anonymous reader writes: NVIDIA has unveiled the Jetson TX1 development board powered by their Tegra X1 SoC. The Jetson TX1 has a Maxwell GPU capable of 1 TFLOP/s, four 64-bit ARM A57 processors, 4GB of RAM, and 16GB of onboard storage. NVIDIA isn't yet allowing media to publish benchmarks, but the company's reported figures show the graphics and deep learning performance to be comparable to an Intel Core i7-6700K while scoring multiple times better on performance-per-Watt. This development board costs $599 (or $299 for the educational version) and consumes less than 10 Watts.
what could/would I do with one as a layman with a passing (but growing) interest?
You could buy one and leave it in the box, then post vague questions on Slashdot that don't give any hint as to what your project actually is :p
being equally fast as intels graphics is like crowing about beating a legless man in a foot race.