For me the reason why i want this games (if i have a chance to buy Xbox One) because i never had a chance to play Halo series (i played 2 but get bored easily on Xbox original).
So this definitely a masterpiece for people who have not play or for a collector, or a crazy Halo fans. Yeah I agree if you already have the previous series it's not interesting anymore "and meta score is there to help you decide because you have the games in your previous console" . Unless if you really want to replay some campaign in a glory 1080p and 60 fps and small tweaked graphic.
Yeah, i respect your choice, and you can buy the games later if you really feel you need to preserve the games ( as a collector ) but you don't have to worry, you might get a platinum edition for more cheaper price.