The problem is, all of those things you list have very specific and complex functional designs.
Apple patented a rectangle with a glass face. The patent is ridiculously broad, and if the court upholds it, it effectively blocks every single slate tablet on the market today, and Apple WILL sue every other manufacturer if they win this case.
Their problem is the patent is so broad, that it is indefensible. Samsung are using things like the 2001 tablet as examples of how broad the Apple patent is, and how it is impossible to design a device that doesn't infringe on this patent, and how the exact form factor the patent describes already existed long before Apple filed for the patent.