Just to clarify. I agree with the post that said that the DLC threat will be limited to add on content. Our current Internet download bandwidth just cannot handle the amount of information that needs to be transferred in order to download full games. Also, I think the publishers would be wrong to try to circumvent GME in it's distribution. GME does so much to help advertise the games being sold today, that without GME to help promote the games, publishers would suffer greatly. Just my opinions.
Not to pick on you but you are assuming things don't change from their current state of capabilities. Might be so in the short run, but as technology improves at exponential rates, it might be possible in a shorter time than you think.