50 years is a very long time. I make such predictions by seeing the technologies that work in today's labs and the dreams that can be achieved with some scientific advances. Here are some ideas.

These long-haul voyages are carried out by the hyper-loop or plane/ rocket. Hyper loop is very efficient and fast but limited to fixed routes. Earth and spacecraft use similar propulsion (see below), with the main differences being as follows, Whether things are designed for low gravity.

Prepare an autonomous multi-rotor aircraft (drone). We have the technology today, but the cost of energy is extreme.

Cheap clean energy has changed everything and is about to happen. There are too many ways to get there, and everyone wants it (except Saudi Arabia, of course). Solar cells, thorium reactors, improved uranium reactors, and of course fusion, all have the potential to play role, especially in the next 30 years. But more likely, new technologies will be invented. We know many ways to generate clean energy on a planetary scale. You need to understand how to make them cheaper.

Space travel becomes a daily occurrence thanks to space elevators and nuclear missiles. Both technologies require scientific progress and a lot of engineering skills. The main problem is that most people don't have many reasons to go to space. Science, Tourism, Satellite maintenance, Perhaps asteroid mining. Mankind launches the first interstellar spacecraft and generally begins to consider interstellar navigation.

Mars, like Antarctica today, has small colonies primarily to satisfy research objectives and human inquisitive minds. You can visit it, but the price is amazing, and few people do.

The Artificial Intelligence is almost as intelligent as humans, and robots take over most of the tasks that humans do today. Most things will be very cheap, but only high-end engineers and artists can find a job. Basic income policies were introduced long before this and will be supported by most of the population. After 50 years, this will look perfectly normal. The few who work receive extreme fame as well as perks like waterfront homes and private resorts. (This is Utopian version. I also have a dystopian version but I feel good today).

Entertainment is completely immersive. You can't say it's not real. You may be able to erase the memory you are in the program as you really think you are there. May be you're in the program right now and you don;t event know that. Pay homage to the robot when you make up.