10,000 Brilliant Ideas

Sure we have video chat and on-line meetings, but how about a full-on on-line conference? I'm imagining a second life sort of experience (do meetings exist in second life?) where everyone has an avatar and buzzes about a virtual conference hall, checking out booths, talking with people, going into rooms and watching presentations, etc. I'm imagining a proper conference fee (to weed out the weirdos), and a full real-time audio-visual experience. Following the trend of all things virtual, first it tries to replicate real life, making it as easy to talk with someone or ask about a product as it is in a real conference. Then if that works bring in the flying cars,  pegasuses, etc. Alternatively, my brain imagines a real-conference that is only attended by remotely controlled robots. So the only humans at the conference are organizers in charge of keeping the robots up-right. But likely this is just an art experiment (which doesn't mean I don't want to do it). UPDATE R

How hard might it be to make a disposable air filter that fits in your two nostrils? Would it look weird no matter what and thus be a deal breaker or could you make it look socially acceptable?

Basically you have a virtual car. With a driver. Here's how BlacKab works: You think, I should be getting to some place . You look at your smart phone and touch the BlacKab appKab. It tells you a Kab is 5 minutes away. You touch the "Come get me" button. You then finish the rest of your mango shake until a few minutes later your smart phone beeps. You walk outside to see a sleek black taxi with the words "BlacKab client priority" waiting for you. You climb inside and the driver says "Good afternoon Ms Yorname, where would you like to go?" You then go to said destination, climb out, pay nothing and go inside. Then comes the weekend. You check your phone again and select "I drive". It tells you that cars for this weekend are this much per day and the top few cars you prefer. You select one and confirm what time you'd like it. You wake up Saturday morning with the car in front of your house with the keys in the mailbox. You take it for t