While AMD is committed to a two architecture roadmap going forward (Bobcat and Bulldozer) we’ll see three fairly different chips addressing the various market segments in 2011.
Bobcat will do low end/low power (think netbooks and nettops), Llano will do mainstream notebooks (e.g. MacBook, HP Envy equivalent) and Bulldozer will be used for high end desktops and servers. Llano actually uses a Phenom II derived core so it’s technically a third architecture but I’d expect its market to eventually be split between Bobcat and Bulldozer based designs.
http://www.anandtech.com/show/3863/a...hot-chips-2010