According to Engadget the pack will adds an absurd level of visual detail for PC players.

If you really want rust and scratches on your power Armor then this upgrade is the sort of thing you want. The only problem is that you need a high-powered system to run it.

The developer recommends at least a 2015-era desktop Core i7 chip, 8GB of RAM, and a monster graphics card. Nothing short of a GeForce GTX 1080 or the as yet unreleased AMD Radeon RX 490.

The extra artwork will suck up an extra 58GB of storage. If you have that sort of gear you are probably not gaming on a console, but apparentlythe PS4 Pro will play Fallout 4 at 1440p resolution if you have a 4K set.

The new pack is not all for those with more money than Bill Gates, apparently, everyone should notice both a greater draw distance for objects and improved "godray" lighting effects.