If you've got a Netflix account, the decision to buy this is a no-brainer. Connect the Roku box to your TV and it automatically finds your home's Wi-Fi network and you're good to go. It streams 12,000 movies and TV shows for free and you can hold on to them as long as you want. Netflix is constantly adding more programming. One day, video-on-demand streaming through devices like the Roku box will completely replace DVDs. Price: $99, plus Netflix subscription