Apple tends to prefer "later" when it comes to adding RAM, since it also increases power consumption. Right now, most applications barely take advantage of the current capabilities of the processor, and there aren't many mobile applications that as yet need 1GB of RAM. Multitasking is a good argument for an increase, but if it is limited to 2 applications running side by side, there's probably no rush to increase it to 4GB. Apple still sells Macs limited to 4GB.
5/13/14 at 3:22pm