From an aesthetic point of view that wouldn't make much sense. Everything is shifting to aluminum unibody designs. They won't just cut out the 13" MBP model from the 13-15-17 MBP line. This is exactly what they fixed a few years ago when they added it to the lineup.
The plastic model doesn't make much sense to me, but it must still be selling I guess. If anything, I think the plastic design is the next to go — this time for good.
not to hijack the thread; macbook white probably the best seller outside of US where price really matters
you need two entry level Mac systems, one desktop -> Macmini and one laptop -> $999 macbook. I wish actually iMac starting in $999.
if you noticed in the earnings call almost 50% of the revenue is from outside of US. Most of it comes from iPhone and there is a way to improve mac sales outside of US.