In "Golf Has Never Failed Me" Ross gushes about the possibilities of the new fangled bulldozers. I say yes, his courses would be different today. Besides using technology to move whatever dirt he needed to move faster, he would be influenced, as we all are, by the desire NOT to build the same old course over and over again (assuming he is alive to the age of 200 or so!)
He would have had to respond to the same things we have to respond to - bigger greens on busier courses, bigger tees, more tees for diverse play, and of course, environmental laws. We can debate just how he might have responded, and that would be fun, but he would have responded - or he would have been out of business!
Its hard to think that way in an age where the trend is to go back to his (and other GCA's of the GA) style, but he did change his somewhat pedestrian bunker style at Seminole - following rather than leading in style. If he stayed in the exact same mold, I think he would lost business to the newer trends and bolder styles of Thompson and RTJ - just as modern gca's that stay in the "moundy-moundy" style of the 90's are losing business to the Golden Age stylists today.