He mentions a useful life of three years - but within three years, I'd expect ARM laptops to have largely replaced intel laptops, and be lighter, slimmer, have

He mentions a useful life of three years - but within three years, I'd expect ARM laptops to have largely replaced intel laptops, and be lighter, slimmer, have longer battery life, etc. Dual-core machines are out this year and are already fast enough for non-intensive tasks. Quad-core are expected next year. As a guide, in three years (2014) Tegra (Stark) is expected, which 100 times faster than Tegra 2. Apple's internal cpu could well be faster. Three years is a long time. http://en.wikipedia.org/wiki/Nvidia_Tegra#Tegra_2_series http://en.wikipedia.org/wiki/Nvidia_Tegra#Tegra_2_series