> a real "the future is now!" moment to me would be man walking on Mars or being able to fly from LA to Paris in 45 minutes. But these ideas are not unimaginab

> a real "the future is now!" moment to me would be man walking on Mars or being able to fly from LA to Paris in 45 minutes. But these ideas are not unimaginably far from what we presently can do. Previous sci-fi ideas were unbelievable. I'd like to hear some ideas which are unbelievable again. Everything I heard so far just seems quite sensible and achievable.