Attention, home video viewers: Hollywood has noticed you're not buying as many movies lately, and that not even the introduction of Blu-ray has slowed the slump. Now, the industry is hoping that the advent of cloud storage will get you to buy movies again, using streaming video. (Yes, you're already accustomed to using streaming video to rent movies, but the studios want you to buy as well.) As such, say hello to two new rival cloud services -- UltraViolet, launching this week with the home video releases of 'Green Lantern' and 'Horrible Bosses,' and Apple's yet-unnamed movie service, launching soon -- designed to hopefully change your movie-buying behavior. Both services offer you the option of watching your movie on a variety of devices, wherever you happen to be, but can Hollywood use the convenience of cloud storage and streaming to get you to spend more on what you're already getting?