The only barrier I see is your imagination that forces you to generate some strange questions. Laptop is a laptop and made of laptop and capable of what laptops are capable of. No more but no less.

Nah, building will be fun. Bad time will be for those who will use that bridge:)

Dog (and other big dangerous animals) owners in cities should be wearing tags with their basic ID data too. Maybe even those blinking lamps like firefighters or police. Don’t know how they’re called in English.