Mobile devices and laptops are very different. We already have one charger across all mobile devices (be it the older 30 pin or the newer Lightning connector).
Or just use a USB hub?
It sounds like to me that you're looking for a solution for a problem that doesn't exist.
I'm not sure who these others are you refer to, but is carrying a cable that much of an issue?
If you're travelling with your laptop, you are 100% going to take your MagSafe charger and putting a Lightning cable in your rucksack is going to make no difference whatsoever to your travel plans.
Again, it sounds to me like you're asking for a solution to a problem that simply doesn't exist.
usbC is open source amongst ALL manufacturers. All devices will goto usb C sooner rather than later. Re-read my post with this in mind.