Recently, I wrote about voice communications and books becoming virtual, i.e. an application on a mobile computer. Here's how remote control follows the same path (NYT):

And so now we have a bounty of applications and accessories that let us use the technology we already have to control the technology we already have. This is not only frugal, but upgradeable and flexible. Whether you want to control your music, your television or your PowerPoint presentation, there’s probably a solution using your phone.