After almost 20 years of explaining websites don't need to look the same in all browsers I think I'm done. You have the ability to make progressively enhanced websites, more so than ever before. Use it. Don't use it. Just don't argue with me about it!
I'm writing my talks for next year and we will be looking to the future. I am nothing if not pragmatic. I build sites and applications that have to WORK everywhere, that support as many places as possible. But "look" the same. No. Not possible.