A car today was not a car in the past. Having seen old cars, cars like a 92 and 94 camry (mine being a 94 camry) and now 2003+ Camrys. Just opening the hood can tell you how complex and advanced cars are today.

Operation wise, not much has changed. A gas pedal is still a gas pedal, brake still brake. But hey hold it down and you get antilock brakes! But actual design wise..haha huge change. As my dad says, it's impossible to do any self-work on a Camry nowadays, compared to the older ones. It's just easier to take it to the dealership. And now they're coming with even more electronics built in.

I think the tablet is the same way, out of the box. Operational wise it works just fine like a car. Browse the internet, use skype, yup all fine. Start tinkering and your going reach complexity real quick

But as to which, I say a car. It's rapidly reaching a combination of car mechanics and electronics as we know them today.