[marssaxman]

Well, maybe they can, but I haven't seen it happen, and it has never been truly indistinguishable in the past when people have made similar claims. Cross-platform UI tools have been coming and going for years, and "write once, run anywhere" has always been a goal and not an accomplishment. People said the same thing about Java apps, but you could always tell - there was always something that didn't fit right, and the "uncanny valley" effect makes it hard to respond with anything other than revulsion when you realize that you're working with an elaborate fake.