We kinda knew this for a week already, Panasonic is updating their laptop range, the R/T/W/Y4. Same design, but the CPU and HDD have been slightly upgraded.

The R4 first: the HDD grows from 40 to 60Gb, but the same CPU is kept. Same story for the T4 and W4.

The Y4 keeps its 60Gb, and the 1.5Ghz Pentium M758 is replaced by a 1.6Ghz Pentium M768. So no major changes here, just slight upgrades.