Perversely enough, consolidation of production into 'big agra' and mechanized might be the best play to disrupt the existing system for something more efficient and less stagnant. There are myriad paths to get to said endpoint however, not all of them equal. I don't expect said path to go well for smallholders by definition, though even though the survivors would no longer qualify as smallholders for one reason or the other.
Winners and losers I must note are the result of any system, even in ones of very high equity or even or especially a 'null system'.