Went back and watched this from two years ago just now:
http://www.gametrailers.com/video/protoss-demo-starcraft-ii/31802
Crazy how different the game looks in such a short period of time. Also, had no idea about the Immortal shields (or rather, totally forgot). Is that part (about them having special shields for hard hitting attacks) still true? Going to have to mess with that later on.
Pretty hilarious how slow everything looks in that video (especially the Phoenixes with their equally hilariously broken looking overload ability). Also laughed considerably at how ridiculous the mothership was back then (especially considering how not ridiculous it is now).