Sure, there's plenty of game styles that aga could cope with if using a higher resolution, but I was actually responding to ChaosLords suggestion that a game running in 320x256 isnt pushing aga at all.
It would be nice if there was some games assuming, say, hyopothetically, an '030, some fast ram, and aga as minimum with as much time, effort, and man power as was put into the bigger earlier amiga games, but unfortunately it wasnt really commercially viable, and there's very little collaberation between remaining developers to be able to produce many elaborate homebrew games (ie. games beyond the scope of 1 or 2 people).
Bit of a shame, as the enthusiasm is still there by quite a few people.
p.s. C64 actually can do starglider2

(check c64gtw

Probably shouldve checked 1st, but Im pretty sure my memory isnt playing tricks on me and there actually was a demo there)