The cost of electricity for running a desktop computer is on the order of 2 cents per hour (assuming it draws around 200 W while browsing). If you reduce that by 20%, you save a whopping $8 a year if you spend 5 hours browsing every day.
No, this is mainly motivated by laptops, and I'd say it's even more related to thermal management than battery life. Macbooks are notorious for being very hot under high load, so naturally Apple wants a common task like browsing to be low load/heat.
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The cost of electricity for running a desktop computer is on the order of 2 cents per hour (assuming it draws around 200 W while browsing). If you reduce that by 20%, you save a whopping $8 a year if you spend 5 hours browsing every day.
No, this is mainly motivated by laptops, and I'd say it's even more related to thermal management than battery life. Macbooks are notorious for being very hot under high load, so naturally Apple wants a common task like browsing to be low load/heat.