AMD offers excellent performance per dollar, but they are not selling them at this price for the benefit of the consumer. AMD can't charge top-dollar because they don't have the performance to merit the premium. Energy efficiency has caught some consumers attention, but if you do the math, Intel is 30-100% more efficient at compute intensive tasks.
AMD have a better IGP, but Intel's IGP works fine in similar scenarios and for the niche that care about GPU performance both IGPs are poor. The AMD APU is not strong enough to merit a premium in the market.
I hope your views of Trinity hold true, but Trinity is based on Bulldozer and the TDPs for this part are a generation (or two) behind the equivalent Intel SandyBridge parts. The micro-benchmark performance of Bulldozer doesn't appear to be compete with Phenom (see
http://www.xbitlabs.com/a.../amd-fx-8150_8.html#sect1.) Trinity is going up against Ivy Bridge. Most of the media believe Intel's 3D transistors and 22nm process are going to offer significant power savings and greater IPC compared to SB. Unless Intel has manufacturing issues, it's hard to see AMD capturing significant share.