An indoor farmer's market would kill it's appeal--- it'd be just another grocery store, with higher prices. And Whole Foods is coming quite near it very soon...
"Distant" suburbs is an oxymoron in Eugene: we're all just a few minutes from downtown, unless it's at traffic-jam extremes. And there are plenty of reasons for folks to go there: unique restaurants, cafes, bakeries, and coffee shops, the Bijou Metro cinema, art galleries.