Texas and Florida are the present; not the future, IMO. They are already No. 2 & 3 in population.
Texas and Florida are growing rapidly; elevating in national status, but are merely repeating what California did from the 1940's to the 1990's. In this time, California inspired the world and was the envy of every state as it demonstrated the new model of city and state building in the post war boom. This was truly the image of the future manifesting as it created the American Dream... California was the fastest growing state with low taxes and cheap/plentiful land depicting Beautiful Suburban Sprawling neighborhoods, building great universities, highly developing industries, all of which attracted people to move from all over the world... etc. I love Florida as that is the state I was born and raised in; and Texas is great, but Nothing new or innovative is being caused in either of these states. Yes, they will have more influence over the national government, but that's hardly "the future."
The American Dream is being checked by shifting climate patterns and the effects of rapid growth; CA is the first to really feel the effect... but it won't be the last. What is in the future for these already established states is all of the things that California is dealing with now. Traffic, pollution, rapid demographic shifts, high costs of living, displacement, built out infrastructure, transition from solidly Red to Blue, cities that have no more place to grow outward, and climate change checking growth... leading to new and more laws/taxes, and structures to check the effects of the rapid growth. California's unchecked sprawl led to wild fires
cleansing areas where humans probably shouldn't live in mass. California's massive growth ignorant of the effects of cars on air pollution, led to the worst polluted cities in the nation. As a reaction, environmental laws were passed and agency created to deal with it (^taxes). The once perceived "gold standard" massive freeway networks were widened to the point where there is no more space, leading to the worst traffic in the nation.
Texas is merely repeating massive unchecked sprawl growth, leading to effects such traffic, pollution, more Hurricane Harvey Houston flooding, droughts, and more winter storms knocking out power, thereby pissing people off and them reacting by creating more laws/taxes to prevent/protect. This is all stuff that is sort of "been there, done that"
What lies in "the future" is something else that we have yet to see demonstrated from these states. A future outside of Red/Blue bickering, outside of sprawl, surface car traffic and big box stores..., a new way of life that inspires the world... and I dont see it in either of these places. Would love to see the future somewhere... Florida and Texas are just an ordinary sunbelt growth boom/bust state story following an already established model