1. Battery powered devices that can be charged through induction, namely electric toothbrushes
2. Devices that can sync with servers and computers wirelessly, like my Zune
3. Headphones that connect to devices wirelessly, ala bluetooth
So why haven't we yet combined all three technologies and made completely sealed media players and cellphones? Seems like the biggest reliability problem with the devices lies with 'em getting wet or getting their ports broken from being dropped or improperly removing a cable. If the devices were completely sealed, then those become nonissues.
Batteries and SIM-cards would be a problem, because you need to penetrate the device to replace those. Perhaps some kind of sealed door held on with screws for the occasion that you need to replace a piece of innards. Heck, we've been able to make waterproof watches for decades. Why not waterproof tech?
And now that we have laptops with no internal moving parts, why not sealed laptops? I'd love a laptop that I could toss in the dishwasher when it gets dirty.