Remaking Brood War in HD is not a bad idea.
I personally find Brood War very aesthetically appealing, but there's no ignoring the fact that it's an old game, with a simple increase in pixel density and in this case a resolution change and Brood War looks as young and beautiful as it ever did!
I can already hear the heards of people screaming over the internet because of the resolution change so before I continue I'd like to say that I'm not actually an advocate of any kind of a resolution change when it comes to the player's point of view because that could potentially have a detrimental impact on the competative gameplay of Brood War, something that should most definitely be kept exactly as it is, if Brood War HD were to ever come to fruition.
The difference isn't significant and immediately apparent, but it definitely adds a crisp feel to the game and also breathes in some new life into the game
What I would like to see added/changed and what I would like kept the same in a potential Broox War HD:
-Increased pixel density.
-Player screen resolution kept the same.
-Replay - spectator resolution slider (Replays can be watched in many different resolutions - the ability to zoom in and out.)
-More replay functionality (Completely optional!)
-Game mechanics would stay entirely the same.
-Backwards compatability to any non-HD version of BW.
-Some of the private servers such as ICCUP and FISH available under de facto settings and an anti-hack program built-in as well.
I personally think that with these functionalities the re-released version would easily warrant a price tag of 15-20$. Which would most likely cover the development cost + add some revenue for Blizzard and raise interest in Brood War. Win/Win/Win
I know that this is a pipe dream, but this potentially easily achievable remake has potential monetary prospects, could also do wonders for the Brood War's scene.
Purely theoretical. Yes.
Hard to pull off. Probably not.
Would it sell. It probably would.
Will this ever happen? I don't know, but the recent success of the re-released Age of Empires 2 in HD most certainly shows that there is interest in old classic remastered RTS.
Pictures are from this blog, courtesy of 538