Given how technology is moving, all the functions of your phone will be migrated directly into your brain. The “screen” will be projected into your vision and options chosen by thoughts.
All vision, sound, thoughts and feelings could be recorded. You could download and replay any recording from yourself or anybody else. Communication by mindscapes could replace the spoken and written word.
Your mind could operate any physical body.
Your perception of reality could be changed. Undesired emotions or detrimental thought patterns could be switched-off.
You could instantly download data and skills and have greatly augmented cognitive processing speeds.
Your thoughts could interact with artificial intelligence that could calculate the most efficient algorithm for any process you wish to undertake.
This isn’t fanciful thinking, it’s the implied intention for the not too distant future. The unasked question is to what extent this is really desirable.
Of course any totalitarian regime could easily control their population by these means. An empowered sadist could run amok in all the enslaved minds.
Philosophically it makes me wonder, what is it to be a human being? Practically it makes me certain, humans have to become worthy of the knowledge we are gaining.