Correct me if I'm wrong, but weren't all of these things in existence when the Interstate Commerce Clause went into effect?
Sorry, but that was part of the Constitution from the beginning. Article I, Section 8 reads:
The Congress shall have power...However, Breyer and his ilk need to stop using Merriam-Webster's as their dictionary of choice, where "social interaction" takes precedence over "the exchange or buying and selling of commodities on a large scale involving transportation from place to place"....(t)o regulate commerce with foreign nations, and among the several states, and with the Indian tribes;....