Nothing new really, he wasn't there last year either. Miyamoto and others will be present.
Nintendo told IGN today that company President and CEO Satoru Iwata would be skipping E3 for the second consecutive year in a row.
In a statement, the company said, “Nintendo’s focus for E3 this year will be showcasing the many games we have coming for both Wii U and Nintendo 3DS. Mr. Miyamoto and other members of our development team will be in Los Angeles to explain these games and the unique experiences that each offers. Mr. Iwata’s focus in this period will be on other areas of our business that require his presence in Japan.”