will GTA5 be available as digital download on next gen consoles?

I am trying to decide if I should get current gen console now and GTA5, or wait for next gen and download it, but I'm not sure if it's going to be available first day as download or physical. Compatibility is out of the question specially for XO, so I'm hoping it should be at least a download? A used console right now is going for 100+ on ebay.