Recent game industry trade articles have been bandying about the very real possibility that GameStop’s lucrative used game sales are going to begin to tank as the digital distribution model grows. Is all that yummy buy low/sell high action going to just fade away? GameStop doesn’t seem to be too concerned. IndustryGamers reports on a recent study by Sterne Agee analyst Arvind Bhatia that claims that digital download technology won’t reach a critical threshold of …