Two games this past week had very hefty hard disk requirements in the official specs - and while many considered Red Dead Redemptopn 2 PC's 150GB requirement to be excessive, it was soon shadowed by the announcement Modern Warfare's reboot would require a whopping 175GB.
Activision have now made a statement explaining their justifcation for using such a huge amount of storage, clarifying that the game won't actually use that much space at launch, but that the company recommend that they "keep 175GB free for post-launch content" - hmm.
175GB is the storage space we recommend players keep available in order to download the post-launch content we’ll be bringing to Modern Warfare. At launch, the initial download will be smaller.
Still, either the base game is still mammoth in size, or that's one hell of a post-launch content roadmap. Right now, it's hard to tell which might be case, it wouldn't surprise me if there's a lot of DLC and microtransactions in the game.
As for what the actual launch size will be, we don't really know, Activision have not confirmed, but we'll be keeping an eye on the situation and report with any further information.