My current laptop (edit: used for for studio apps, 3D modeling and rendering, and AI stuff) draws 240W but I’d say it’s an improvement over the 500W+ I would be drawing from a desktop that would have been in it’s place. The performance isn’t that competitive with desktop parts but the Perf/Watt definitely better.
Most people are just going to be using their phones and tablets to browse the web and watch videos anyway, with the odd Ultrabook here and there which are still pretty good in a Perf/Watt sense.