I understand that H3 was never released on PC so a conversion would've been problematic for 343i to handle, but come on people are screaming out for this, 343i should've given the masses what they wanted.
They did a project for PC that was on the Halo 3 engine but released in another country, but i'm afraid if I mention the name i'll get edited and yelled at by a forum mod.
But basically putting Halo 3 on the PC is possible and probably something that will eventually come but not for a very long time cause of marketing and development reasons.
Just because the mass demands something,doesnt mean they get it.
343 has decided to not release a Halo3 anniversary edition,a decision that the community should accept.Im pretty sure 343 has valid reason for this.
Supply and demand, the same reason the Halo series is still developed. Just because the mass demands something does mean they should get it, that is part of being a good developer and the reason we can use an Xbox One offline and can share and resell Xbox One game discs, things the masses demanded from development. And the industry of technology and video games is probably the strongest market for the mass getting what they demand just cause that is how good companies work.
While 343 may have a valid reason and its probably just marketing and development time it would be nice to hear some feedback or some type of response besides that it is not currently in development, such as maybe they are looking at a future release or not looking at doing it at all, more clarification and clear communication with the community.