You are watching a gripping movie on your giant wall-mounted TV, with surround-sound speakers giving you the sense of being right in the action. Now, you may have the chance to step into one of the final sense frontiers: smell. The designer tells us that these devices take advantage of how smells evoke memories and can alter the way we think. They notify us of important information, in a subconscious manner. The device’s diffuser has a collection of 16 crafted scents. Oils are accurately blended by passing them through piezoelectric micro-pumps onto a piezo diffuser, and then sprayed into the room by a fan to create a “smellscape.”

Likelihood of being built: 5/10.

I think the best way to do this is with a nose for subtle and specific scents. No one wants to smell decomposing bodies or jet fuel while watching a movie–even if that’s what they’re seeing on the big screen. Another factor is the lingering nature of these smells–it’s much better to catch a whiff of something and have it fade than to have a smell waft in your house for hours. Also, when am I going to get my surround-taste features?