I don't think you understand chips. First, the major trend in chips is smaller lines and lower voltage. See that CPU's have gone from 5v to 3.3 to 2.5 to 1.8. Lower voltage for the same watts means higher current. Current needs good conductors. So, chip designers need more current, not just transistor speed. In the future, when chip voltage goes to .5v and below, this will be an even larger problem. This is the same problem an electric stove faces in a house so they use 220v instead of 110v. Same for long distance electrical transmission at 220,000v. Otherwise the overhead lines would be very thick.
So, chip designers need Cu to use in these very large, low voltage chips.
You are right in that everyone is going to use copper. Applied, SemiTool, etc. are all helping. And given the annoucement of next year shipments by IBM, I don't think they will be very far ahead, if at all.