I have the opinion that specs for low-end-system should - or rather must - be incorporated into any game, at least to give a sign to people saying "hello, we haven't forgotten you".
High resolutions are good - but there are still people out there who are siimply not able to affort the newest hardware.
Remember Origin ? They made games with such high specs that - at the time of relese - no-one seriously believe the average gamer would be able to play the game with fulfilling these specs at that time. Only generations later the average gamer would be able to fulfull the recommended specs.
I don't want that, because it simply excludes some people.