The article gets around to what will be improved/upgraded around midway in the article. Basically, it's new wings and a bunch of new avionics that bring the A-10 up to what is currently used in other planes. One of the biggest of the latter is digital communications capability with other planes, improving coordination and overall environment awareness. That the 1970s-designed electrical system of planes last built in the 1980s is adequate or upgradable to handle modern avionics is pretty amazing. Then again, the B-52 is a decade or two older, and the F-15s and F-16s just a few years newer.