There will be one more after this one, but after that I think the dedicated console idea will start to become outdated.
It doesn't mean "gaming is dead" or anything stupid like that, it just means people will consume/access their content in different ways, in all likelyhood I think in 10-15 years you will get all your movies, TV/cable, and games from an online service and you'll be able to enjoy that content on a variety of devices at home and away from the home too.
Just because Blockbuster Video died doesn't mean people stopped watching movies at home, they just do so in different ways today. The console is not the be all/end all of gaming.







