But the real improvement is battery life. Intel Haswell machines are lasting 10 to 16 hours now, and this number will only improve as Intel moves to 14nm and 10nm designs.
Computers aren't getting faster because no one cares about that. The majority of the design effort is now into battery life. A Dell Venue 8 Pro lasts 8+ hours on a single charge, on a tiny 20Whr battery (while being faster than the 4-year-old Macbook Pro). The 4-year-old Core2Duo Macbook Pros lasted only a couple of hours on behemoth 60Whr batteries.
Battery efficiency will matter when it comes down to lightness and style. Better battery efficiency will lead to thinner, sleeker, lighter designs. Generally speaking, the "progress" of modern computers is battery efficiency, leading to smaller batteries, leading to lighter and smaller computers.
