I think it's inevitable that we're going to see more and more advertising in games. Advertising is prominent in pretty much all other media - I don't see why games should be any different. You cant really blame game companies for taking advantage of all revenue streams available - they're in business to make money, afterall.
However, I think game advertising will need to tread a fine line. If it's too intrusive (like being forced to watch a 30 second ad after every level), people will just get too pissed off and not play.
However, I think game advertising will need to tread a fine line. If it's too intrusive (like being forced to watch a 30 second ad after every level), people will just get too pissed off and not play.