(NBBJ) - Wine industry economics in California have changed dramatically in the last year — even since the beginning of this year — as more wine producers realize the marketplace for grapes and wine in bulk won’t be large enough to keep pace with sales of finished wine. And the outlook for adding significant supply of major varietals in the state, particularly in the North Coast, will be challenging for the foreseeable future, according to experts at a major industry seminar last week in Napa.