Re: Digital watches
G-Shocks can go about ten years between battery changes.
My first G-Shock is nearly that old and seems fine. I just checked it (I keep it on a windowsill out of direct light) and it claims to be fully charged. I replaced it a couple of years ago because someone warned me that the LCD screen wouldn't last much longer. My current G-shock is analogue to avoid that problem.
To clarify what I was trying to say: I wasn't trying to denigrate digital watches. Just likening the mobile fad to that of the digital watch fad and wondering if/why people still get excited when a new phone is released.