I recently read a post that said "remember your first computer?" (in my case the Commodore 64, but maybe we shoulkd count my Atarai 2600 and Intellivision game consoles, too). "Think about how archaic it feels now. That's how a kid today will remember the iPad in 20 years."
I cant wait for the next 20 years to happen .-)
Maybe we will charge our devices via sound - so we won't be thinking about charging anythnig anymore: