The AMP website, and some others it has to be said, has sexy stuff that probably looks really good.. but many will not see it. This includes me because I can't be bothering with tweaking my browsers all the time
The problem is that the people who design sites want to push the technology and use the latest sexy gismos. They will also say that its just a matter of loading the latest browser or getting a simple plug-in and there are lots of benefits in using the technology they are.
And of course all this browser updating is supposed to work really easily. But the reality is that things often go wrong in downloading things and not everybody who accesses a website has control of the computer they are using anyway - and hence they often can't change anything on their machine. And even if you do get a plugin the next time you get a new browser you have to get another plugin.. or the plugin changes became it version 3b on teh page you are trying to load and you only have version 2 on your machine.
I remember having real problems with Ballet.co when we first introduced the designs you see now. They came with some clever Frames and Javescript technology... but after 3 months of tweaking things and telling folks with problems to do this or that, and that it was all really fine anyway, I stood back concluded that we were wrong and removed all the technology. The result was that all the hassles went away and I could concentrate on content.
The reality is that such websites will probably not be reaching 30% of the audience that visit them. They might win prizes, but not from the user community, just other web designers...