I've always thought it would be a cool feature if you could watch replays and/or observe games from the view of the players. Your camera would move as the player moved it during the match and you could see what units are being selected and orders being issued. I think this could be an interesting way to watch a pro match and give you a better understanding of what the player is thinking and focusing on.

I haven't heard of anything like this but it could be a great simple addition.

When you watch a replay (either taken from single player or multiplayer) you can actually switch from the good old ‘observer’ mode to what you’re referring to as ‘first person view’.

You will then be able to see what units are being selected (control groups included), and the camera would move exactly as the player moved it during the game, plus you will see all the commands issued by the player, rally points and queued commands (such as waypoints). Please note that the cursor itself won’t be recorded.

You will also be able to choose between several overlays which will contain useful information, like the ones you can see in the upper left corner of the Battle Reports (i.e. harvesters, units in play, units lost, APM and more).