While the in-game graphics were nowhere near as good as the cinematics, I must admit that I did enjoy seeing the hardware of the Halo universe displayed in the isometric style of an RTS game and it was somewhat fun for me to build up resources, construct outposts and then deploy a fleet of warthogs or have a bunch of falcons fly across the playing field and wreak damage. I'm sure that the way I played the game would have made a true RTS fan shudder in horror but again I was able to have some fun with it and get to experience the technology of the Halo franchise in a different way. I have no desire to really see another RTS Halo game but as a one-off, it was an interesting experience.
I've always felt that a motion captured, full-CGI movie is the way to go with Halo and I'm really surprised that Microsoft never explored that avenue when it was pushing its script to all the movie studios. To my way of thinking, the pleothora of alien species and endless variations of spaceships and other hardware would make a live action movie impossibly expensive (assuming that the filmmakers actually wanted to do it right). But with CG you can manage those costs and, as long as the story is compelling and the performances solid, still put on a good show. Mo-capped CG productions like Beowulf and A Christmas Carol have shown that the approach can work and be commercially viable if you plan it out and take the time to do it right.