I think both will continue to have their place in kitchens moving forward. Granite is just so damned functional. It works. It's rough, it's tough, it takes all the abuse you can throw at it. Polished granite is probably superior to any other counter surface when it comes to being bulletproof and low-maintenance. And the fact that it's a natural material will give it aesthetic credibility and longevity. Stainless is more likely to fade deeper out of favor, but its functionality, and its roots in the professional kitchen will mean it also will always maintain a certain amount of credibility. That said, I think we're already moving past both materials as the "must-haves" of the modern luxury kitchen. "Sustainable" engineered countertops made from recycled materials are only going to continue to be developed, and someday their functionality may match, or at least approximate, granite's. Stainless is falling out of favor as well, as better manufacturing techniques allow greater color customization. Still, I don't know that either really rise to the level of a "fad." Borrowing Doc Holliday's analogy, which I think in his case was being used to support the opposite opinion, consider wooden floors. There may well have been a time when people were tearing them out for the fad of the moment (shag carpeting, whatever), but wood has always been, and will always be, a sensible, attractive, classic option. So I think it will be with granite and stainless.