Noticeable with bringing back of sub-15-inch MacBook Pro, and maximum 8GB of memory on notebook footprint.
But I feel something missing with MacBook Air.
It is great that it is priced under $2,000 with SSD, however fixed 2GB memory is not sufficient for professional use.
It may be convenient 4GB version with $500 additional cost.
In addition, (but it is not my personal economic interest) 17-inch MacBook Pro could be doubled on memory slots and configured with 16GB or cheaper priced 8GB is very interesting (if possible on 15-inch).
Nowadays, many kind of tasks are done with virtual machine, so 3GB limit of 32-bit operating system has become bottleneck.
We want that benefits of Mac OS X could be boosted with maximum memory available even on the MacBook.