A couple of points
Most AMD fans like AMD because of their performance per price, and seem to think this makes AMD ideal for the mainstream user. This is wrong, the CEO needs to evaluate performance per cost. Terminology wise, profit = price - cost and cost is mainly manufacturing cost which is determined essentially by yield (number of working die) and die size. From the outside it is impossible to determine Intel/AMD manufacturing costs, but there are a lot of reasons to think that Intel's are lower 1) They own their fabs and can optimize their fab without regard to other customers 2) as 80% of the market they have greater return on investment in yield improvement 3)They generally are at smaller process node -> smaller die size and they do it on scale that implies they yields are pretty good. Sandy Bridge yields are most certainly significantly better than llano or bulldozers yields. As a business Intel is probably loathe to lower prices, which is why llano isn't seeing more price competition, but AMD shouldn't start a price war to obtain market share if they don't have lower costs. They should price their chips so that they sell their entire factory output. Additionally that implies that if they have a better product than Intel, they should sell it at higher prices than Intel.
People also blindly state that competition is good and while this is generally true, there are some big qualifications in the PC market. First in duopoly it very easy for two companies to collude on price, especially if one party is dominant, and Intel is dominant in manufacturing capacity and cost. There are two ways to think about the size of the PC market/CPU market. You can sell product to people who don’t have a PC, or sell product to everyone because a new PC is so much better than an existing one. The latter way is a much bigger and lucrative market, and describes the last two decades of CPU sales. Maybe this is coming to an end because hardware performance has crossed a threshold, but in any event, the problem of AMD being the performance/price king is that the cheapest system is the one people already have. As the PC market upgrade cycle lengthens and PC market saturates the sales volume of chips goes down, which is bad for profits. Maybe there are markets to grow in the less developed world, but those markets focus almost exclusively on price which gives advantage to companies that have lower costs, it doesn’t really play into AMD’s advantage in graphics. The reality is that Intel’s biggest competitor is its existing install base, even without AMD it would be profitable for Intel to continue the Moore’s law cycle of CPU improvement and charge prices that encourage people to upgrade existing systems. Profit = (Profit/CPU)*(number of CPUs sold), if the average CPU price was a 1000$, a lot more existing systems would be considered good enough, and few people would by a second system such as a laptop. Intel may be a near monopoly, but the price of computing power has dropped more than just about any product in the last two decades, and I would attribute this to the market value of computing improvements vs. the development cost of engineering said improvements much more than I would attribute it to completion between AMD and Intel. Having AMD around definitely limits Intel’s ability extract profit from their customers, but not nearly as much as people think.