While an interesting possibility, this would go against Apple's explanation about why they were pulling out of Macworld in the first place. According to press release, Apple believes that trade shows are a minor part of how the company reaches customers. There had also been reports that Apple was unhappy with forced release time-table of a January show. Moving to CES -- also a January show -- would also not alleviate this issue.
Cult of Mac cites a single source and gives no indication as to their credibility.