The change mostly benefits 4chan extension/userscript developers (like 4chanX) and board archivers, which have to parse the DOM (the only public 4chan API) back into data. If you look at the current markup (the new markup isn't live yet), it's a total mess of tables and font tags.
Also as mentioned, it has a responsive layout for mobile screens.
I'm pretty sure the new markup is designed by moot (the 4chan admin/creator) himself, so it's fairly clunky for 2012 (wrapper divs and spans everywhere, inline javascript and styles), but again, it's still a vast improvement.
Also as mentioned, it has a responsive layout for mobile screens.
I'm pretty sure the new markup is designed by moot (the 4chan admin/creator) himself, so it's fairly clunky for 2012 (wrapper divs and spans everywhere, inline javascript and styles), but again, it's still a vast improvement.