The issue is that most jobs in the future can be done more cheaply by machines. and yes there might be jobs that cannot be automated but unfortunately that leaves 50% unemployment. The fact is that in a capitalist society if a company can reduce its overheads it will do, if you can produce the same product with just 200 staff where you used to employ 2000 this will happen. And those still in work will receive less pay, because guess what there will be 100s waiting in line, just as qualified wanting that job.
Well, if it makes you feel any better I thought the same thing half a century ago. I even believed it when Jimmy Carter was president, not realizing that it was his policies which caused the massive unemployment, high inflation and general economic malaise.
Funny thing happened though on the way to the 21st century. The forces of free enterprise were unleashed and prosperity reigned for another three decades before anyone could stifle it again.
Yes there will be new businesses, but they will make full use of automation, and off cause with fewer people in paid employment there will be a massive downturn in demand for products, so even less people will be employed.
Yes, that's what many people thought half a century ago, too. The thing is though, the world population has always been limited by the available food supply. All this automation and artificial intelligence you speak of will continue to increase the world's food supply and motivated people throughout the world will keep doing what they've always done ... they'll come up with new and ingenious ideas which perpetuate to the benefit of all mankind.
Oh ... and as to how well people survive, here's a little Biblical perspective ...
And they shall build houses, and inhabit them; and they shall plant vineyards, and eat the fruit of them.
They shall not build, and another inhabit; they shall not plant, and another eat: for as the days of a tree are the days of my people, and mine elect shall long enjoy the work of their hands.
They shall not labour in vain, nor bring forth for trouble; for they are the seed of the blessed of the LORD, and their offspring with them.
And it shall come to pass, that before they call, I will answer; and while they are yet speaking, I will hear. The wolf and the lamb shall feed together, and the lion shall eat straw like the bullock: and dust shall be the serpent's meat. They shall not hurt nor destroy in all my holy mountain, saith the LORD.
But, hey, some would dismiss these words from a few thousand years ago. Not me though.
If nothing else, the internet has equalized many things which were unequal before ... and that trend has only been accelerating. The internet has also served to hold people accountable ... who were never held to account before.