Probably on some Xbox, especially if there is splitscreen available, which has been claimed there will be but you never know, for Halo has been tied to Xbox for years now and couch gaming with splitscreen is part of Halo as well.
The project scarlett depends on what type it is, if it has lost easy and fast playability (as in one of the edge consoles had was being able to play when cartridge/disc was put in and it was game on, no huge installing required), as Xone has lost in addition to IRL social gaming (that H5g lacked by lacking splitscreen).
So if it's just a rapidly outdated computer without classical console edges, it's unlikely I would get it. It would be just waste of money.
But id like more information of the products themselves before I set any decisions in stone.