Let's assume for a moment that WotLK itemisation increases at the same rate as TBC items. If the "Drakonid Arm Blade" is an entry level blue, then we'd be able to make a few interesting predictions out of this. Keep in mind I'm just making a speculation here, the actual items may be a lot better or worse once the beta is released. Just take it with a grain of salt for now.
If you compare the previous items, you'll see that we went from 54.1 to 71.7 DPS for standard grade blues, a difference of 17.6 DPS. If you then were to take this item (Drakonid Arm Blade) and were to add 17.6 DPS to that you'd come to a value of 119,5 DPS for level 80 blues. That is, assuming weapon scaling will work the same way in WotLK as it did in TBC.
Currently the highest ilvl epics in game provide 114.2 DPS. If you compare that to the entry level epics from karazhan, you'll notice a difference of : 114.2 - 87.6 = 26,6 DPS between the highest and lower end epic weapons from raiding.
The DPS difference from entry level blues to epics currently is : 87.6 - 71.7 = 15,9 DPS
Based on the above numbers, one would expect the following level 80 item values :
That's just for 1-handed melee DPS weapons though. 2-handers shouldn't be too hard to figure out if you consider 70.3 as a starting point. Armor would be a different matter entirely.
Still, it's fun to speculate. What do you think?
A difference of 1.2 DPS and 3 ilvl.
A difference of 2.3 DPS. ilvl unknown.
It would appear that we may end up with a good bit more DPS than 162 per hand. Nothing is for certain yet though.