Looks like it's ARM. I suppose that's okay for many, but if you need programs like R, you're out of luck. I'd immediately buy one if it had an Intel or AMD processor.
You can use base R but (unless something has recently changed) not all packages are going to work. I also program in D - including interacting with R - and that won't currently work.
I have compiled numerous R packages as well (dplyr, ggplot2, FactoMineR) and they all work fine on ARM. I agree that you may face issues when it comes to packages relying on JAVA, but otherwise never seen any other problem so far on ARM.