Those capabilities have been in a much smaller slab you have been able to carry around in your pocket for the last 5 years minimum, and that slab was a fully functional computer with full touchscreen display input, microphone/speaker, and cellular.

The Samsung S20 Ultra (2020) has 16gb RAM 256GB of good fast storage, and with Dex you can connect it to a monitor and keyboard+mouse via a USB C dock and get a desktop window environment.

Of course the RPi costs less, but marvel over that, not the form or compactness. RPi innovated on cost, but this capacity in this form is everywhere. They don't even use most of the space inside the keyboard, the compute module is all the size of a smartphone.