I think a lot depends on what happens around the July 20 plot. Quite frankly a lot of lore has developed around Rommel's role in the plot and the fact that he was forced to take his own life. I could be wrong, but my understanding is that his participation was pretty much limited to the fact that he had gotten fed up with Hitler, knew about the plot, and didn't rat on anybody.
In the West's desire during the late 1940s and 1950's to find "good Germans" to help rehabilitate and remilitarize West Germany in the face of the Soviet threat, Rommel's "martyrdom" made him a great symbol for the new Germany and its Bundeswehr, as James Mason can attest.
Personally, I suspect that, had he survived the war (presumably because his tangental involvement in the July 20 plot was not ferreted out by the Gestapo), he would have been considered no different from lots of other Wehrmacht leaders. Not war criminals, but tainted by their willing participation in Germany's wars of aggression and silent toleration of the worse things Hitler was up to as long as Germany was winning the war. It would also not be forgotten that Rommel was, early in his career, a fairly ardent supporter of Hitler - probably more so many other Riechwehr high command leaders. He would have been retired, put out to pasture with his familiy, probably written a few books and memoirs, but not accepted by most modern Germans or the world at large as a potential chancellor or president of the new, increasingly pacifist and anti-nationalist Germany. Arguably, his son would not have had the political career he ended up with, either.