<human>: On a basic level, every car on the planet follows the same kind of blueprint. Give or take some slight changes between left hand drive and right hand drive, the basic design is identical. All doors work in mostly the same way, all steering wheels, pedals, gear stick, wiper controls, indicators are all in the same layout.

From a aesthetic design point of view, most PC's have the same design. Most monitors, towers, keyboards, mouse, and other peripherals have the same design as each other.

Why is it then, when it comes to smart phones and tablets, that the lawsuits come out at the drop of a hat? Apple, Samsung, HTC, Motorolla, Nokia, RIM and Microsoft are all involved in some kind of lawsuit against at least one other company.

From what I can gather the Apple/Samsung lawsuit is largely about the Samsung Galaxy 10.1 Tab "slavishly copying" the design of the iPad.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Why are some design types (such as a car or PC) accepted as the general design for the product, where others (such as smartphones and tablet PC's) deemed to be copyrighted?