Re: A broken watch tells the right time twice a day?
> sat-nav, decent email clients, the internet, bus and train timetable apps, mobile banking (if you trust it), music playback, podcasts, games
Approximately half of those were already possible on later-era Palm devices. (OK, not "decent" mail clients to handle thousands of mails.) But yes, most things that give you today's Teh Intarwebz will have a fairly large power drain.
(I would still be amused to find out just how much runtime you could get if you built a Palm-class device with today's production processes, LiPo battery, and eInk display)