How do you visualize a subspace delimited as segments in 1024 axes? Visualization doesn't scale in this way. You need to focus on the small, and have strong and reliable guarantees about those fundamental particles; combined with a safe and reliable way to compose those particles, and combinations, and so forth. You need proofs, and easy ways of asserting that certain properties are true, with help from the machine such that it can tell you - for certain - whether your assertion is true or not for all possible numbers of threads.

Now dataflow programming languages, which are often visual, are naturally parallelizable in the same way functional languages are, but this is not related to their visual implementation.