You seem to be conflating capitalism with consumer goods.

Consumer goods may indeed disappear completely from the economy, though even this does not follow from your argument.

First: Capitalism doesn't require that corporate income is distributed through wages. The "capital" in "capitalism" implies owners, who can be paid dividends from that ownership.

Second: Before transistors, "computer" meant a human. Before AI, "agent" meant human. Specifically from the perspective of a firm, paying fees to maintain an AI agent isn't that different from paying wages to a human agent, and there are already plenty of firms whose business is selling to other businesses, "B2B" is the keyword.