i dont think itll be anything with flying cars, maybe some weird ergonomic looking poop thats really aerodynamic and is auto controlled and you can program your destination into it and it drives for you (they already have prototype cars like that, that are expected to become commercial sometime in the late 2020's) or maybe in 50-100 years space travel will be so commercialized people will just drive around in space and live in little capsules or something.
technology will really be advanced in the next 50-100 years, hell at the rate technology is advancing right now poop will be really advanced in even 8 years. if you wanna be technical, were already quite advanced right now. but i personally believe technology and science are the Devils right hand advocate, meaning the more technologically advanced we get the worse it is really, technology separates us from nature and from the real world you get lost in the technological world and have no want or need to go out and see the world or meet other people, i mean in the old old days a lot of people considered science to be black magick and a few people still do today. to me it doesnt sound too farfetched that these really prominent high-up scientists somehow 'contact' satan and get the information from him, since hes been here for thousands of years hes gotta be pretty damn smart. (again, just my personal little theory)
but yeah i can definitely see technology being a big part of the future. compact too, especially if the birth rate rises a lot and we run out of room then we will start to see the compact buildings 50 stories high like you were talking about. but 1 thing im curious about, what will the weather be like? and natural disasters... theyre already horrible in this day and age and they say that it only gets worse every year.