Today Aaron Lee of DigiTimes.com (linked above) reports that according to Taiwan makers Sony is rumored to start production of the PS4 console at the end of 2011.
To quote: Sony will have Taiwan-based partners begin production of PlayStation 4 (PS4) featuring body movement-based control like Kinect at the end of 2011 for launch in 2012, according to Taiwan-based component makers.
Foxconn and Pegatron Technology, assemblers of PS3, will undertake assembly of PS4 as well, the sources pointed out.
The planned shipment volume of PS4 in 2012 is at least 20 million units, the sources indicated.
More PlayStation 3 News...