http://www.macrumors.com/2014/08/20/ipad-air-2-2gb-ram/
Apple's second-generation iPad Air may get a memory upgrade, bumping it
up to 2 GB of RAM instead of the 1 GB in the current-generation device,
reports Taiwan's TechNews. According to the site, the increased RAM will be
limited to the iPad Air, as the second-generation Retina iPad mini is
expected to continue to offer 1 GB of RAM.
iPad Air 2的RAM会增到2GB。但是iPad mini Retina 2不会
Previous generations of the iPad have likely not seen a memory increase
in order to keep costs low, save space, and preserve battery, but with
some of the upcoming iOS 8 features, more RAM might be a necessity for
smooth performance.
前几代的iPad苹果为了省钱省空间省耗电，死都不增加内存。但是为了iOS 8的
新功能，苹果必须要增加更多的RAM好让iPad的表现顺
Apple is rumored to be working on split-screen multitasking for the
iPad Air, a feature that will certainly be more memory intensive than
running a single app at a time. The feature is said to allow two apps
to run side-by-side on the iPad in multiple sizes, including 1/4, 1/2,
or 3/4. While split-screen multitasking is likely to be available on
existing devices, it may run better on Apple's upcoming iPad Air, which
is also expected to gain a new A8 processor.
苹果正在iPad上做win 8的分屏多工功能。这个功能需要更多的内存。
这个功能可以让两个app分别在萤幕两侧执行。跟windows 8.1一样，你可以
调整个别视窗至1/2、1/4或3/4的大小。这个新功能虽然有可能再现有的苹果
产品上执行，但它可能在新的配有A8处理器的iPad Air上跑的比较顺。
Thus far, rumors have suggested that split-screen multitasking will be
limited to the iPad Air, though support may come to the iPhone and the
Retina iPad mini at a later date. Split-screen multitasking is unlikely
to be ready for iOS 8's fall debut, but it may come as part of an 8.1 update.
目前分屏多工可能只限于iPad Air。虽然之后有可能支援iPhone和Retina iPad mini。
分屏多工可能还来不及在iOS 8就发表，但是很有可能跟windows 8.1 (1/4,1/2, 3/4)
一样在iOS 8.1中做更新
太开心了～决定要不要升级iDevice做主要考量就是RAM
我的iPad3终于可以升级了
iPhone 5s就继续等iPhone 6LS了