Uh.But H2, 3, 4, 5 all look really dated. I really wish someone with the right abilities would recognize this. There are a lot of awesome artists out there and I wish we could bring together a round table of such heroes.
OK, H4, H5 may be out of the question since you need to do 3D modelling. This probably means less artistry, and more coding, which will turn off the artists and take up too much time besides.
But H3 is still firmly 2D. And 600x800 is a quarter of my monitor. Those guys who are going to spend years remaking the H3 AI, why not modernize and update and improve the look of the game as well? The beautiful game I knew in 1998, is now crude and cartoony 18 years later. I wish someone could summon up a round table of artists, assign each guy 10-20 drawings, and remake H3 for 1920x1200. There's enough resolution on current monitors to capture every detail. I can't imagine how awesome a bunch of artists could make H3 look. Like the Lord of the Rings trilogy? And by making the game look awesome, we can get/ retain far more gamers. That in turn will keep lots of mapmakers in business and lots of multiplayers playing.
BTW I am aware of the Heroes 3HD mod. I installed and played with it for a while. All that mod really does is to make the Heroes3 game fit a bigger screen. It doesn't add details to the dragons, it doesn't give us a detailed hero face in combat, etc.
First of all, you need 3D modelling for HoMM3. Those models are in fact 3D, just like the HoMM4 ones. Sure, they have fewer frames, but that doesn't matter much. To do a proper job you'd need to use the original models and render them in higher resolution.
That said, there is HoMM3 HD Edition. Not the HD mod. HD Edition. The one by Ubisoft. It adds details to all the objects in the world. But, since they did draw things manually, objects have higher resolution but they lose their realism since they are painted over. So everything looks washed out. Also, Ubisoft didn't have all the source code of the game, only RoE, so the HD Edition doesn't include all the nice expansion content.
What should be done is using the HD Edition resources in VCMI. That should be quite doable. Maybe the HD mod too, but much more difficult to pull that off using the old engine.
And what is definitely doable is HD for HoMM2, since everything is hand-drawn there to begin with. Would need to be integrated in fheroes2 later on.