Agreed. Back in the bad old days of table-based layouts it wasn't always possible but in the modern age of CSS2+3, HTML5, and sweet libraries like jQuery it's the rare case where the site can't be bloody close to the design comp (unless you're in IE 6/7, in which case it'll still look good but won't have all the roundy corners and font shadows and such).

The entire Kamasutra is possible, it doesn't mean you should necessarily be doing it all.

Depending on the design, some would require some sort of ugly hack and a lot of testing to get it to work in all browsers consistently. Sure, anything is possible on the web, but it'll probably require flash or use a fixed position layout.

Because we all know that engineering doesn't exist outside of building web apps.