> Spending a small amount of time processing stream A, then dropping that and processing stream B for a moment, then swapping back. Just like how a single core CPU can process multiple threads.

The brain isn't a computer with a single CPU - just because computers are built that way doesn't mean the brain is.

Ie it's only surprising if you start with an erroneous computer based model of how the brain works.

The paper is interesting in that it looks at a core interesting issue - which is how conscious attention is managed given we know that behind the scenes it's 'everything all at once'.