At the time of the Olympus E-620 introduction, it was not yet clear that this would in fact be the only new digital SLR during the PMA show. Whether or not this signifies something is yet to be discovered, although it certainly is remarkable.
The Olympus E-620 looks a lot like the semi-professional Olympus E-30, which was introduced in last year's Q4. However, it is by no means merely a simple copy; saying that would really disqualify the Olympus E620.
The camera's interior is newly developed, maintaining the functionalities of its big brother, the E30.
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Compatiable 