What would really be useful in a 68k browser is a Javascript whitelist feature such as NoScript provides for Firefox. An improved JS engine would be nice, but ultimately there's just too much JS bloat on modern websites; even modern systems get dragged down by it. A whitelist would at least help to contain the insanity; as is, I spend more time in iBrowse waiting for scripts to time out than I do actually looking at webpages.
Even if you get some sort of browser(for the classic amiga) that supports the latest CSS and whatnot, its still going to be kind of discouraging to watch it lock-up the machine for minutes on end while it does some inefficient javascript routine. This is the situation on the Raspberry Pi which I'm sure is faster than an 060.
HTML started as a good idea, but it evolved into this mess that only somewhat runs correctly on high-end x86 hardware.
The best browser on amiga is rdesktop
