Alstrong said:rarely does gameplay employ such camera angles
Correct.
Even if using the same rendering engine and assets, you will never get the exact same impact as you do with cinematic angles. e.g. in the Halo 3 trailer MC walks into a spot light after he passes through the smoke. Everything is setup juuuuuust right for that picture perfect entry. This principle is especially true of faces and bodies. Unless Bungie goes to a 3rd person perspective, MC wont be seen outside of cut scenes, on vehicles and mounted guns, death cam, multi-player, mirrors and reflections, etc Ditto the animation wont be as crisp and choregraphed.
I made the same argument after last years TGS when MGS4 was introduced and people wanted to compare the MGS4 in-engine realtime cinematics to Gears of War gameplay angles (ahh the beatdown I got for such a 'silly' stance hehe). It really isn't a very fair comparison because the focus shifts from looking at the basic engine technology and art quality to the artistic touches and how well acted and animated a cutscene is. Art is a huge part of graphics. I frequently go "YUCK!" when watching GPU demos. What a nice teapot you have there... NOT!
And I think this principle is carrying over some though. We have seen a number of games try new camera angles and even gameplay adjustments to try new camera angles to make gameplay more cinematic and allow the player to get better angles. I know traditionalists would probably hate something like a GRAW or GOW view, but Bungie could really push the series forward if they could execute a more cinematic camera system.