And for those who have everything …

 
With this guitar, you’ll never be out of tune again. Gibson’s Robot Guitar tunes itself, through “built-in microprocessors” that automatically rotate the strings until they reach the correct pitch. The remarkably accurate mechanism “puts an end to the manual peg-twisting,” so you’ll be ready to rock in seconds.
Price: $2,499
Contact: Gibson.com
Source: Popular Mechanics