Now my proposed new addition to The Shire wouldn't have strictly met with Tolkien's approval, but nevertheless, a perfect place could not be truly perfect without them.
It is the mp3 player. What a brilliant invention! You can have your entire music collection (minus those boring filler tracks) in your bag at any time - and when you have a conversation about whether Debbie Harry was a good singer, you can whip out the mp3 player and prove your point.
Course, it also means you can listen to audio books of Tolkien's work whenever you like, too.