I love the iPad for media consumption and battery life. I like the productivity of the Air. I am trying to see if I can replace my iPad and MacBook Air with a single device. Just wondering if the new Surface 3 tablet offers the closest solution to this problem?
As I usually recommend, it is highly dependent upon how you use your devices.
For what it's worth, I'm in the same boat... I have an iPad 4 and an 11" MBA, but would love a hybrid of those two. I currently have an Acer Switch 11 hybrid (and have owned Surfaces in the past) to get a sense of how Windows-based hybrids would fit within my workflow.
Does the Surface 3 wake up instantaneously like the iPad does at the push of a button even after many days or does the Windows OS go into some sort of deep sleep after a certain time? Will the battery life on the Surface 3 be comparable to an iPad?
Windows has 2 or 3 different levels of sleep/suspend. The Surface 3 (and any Windows tablet) will instantly wake up if the interval since it was last "awake" is less than about an hour. Longer than that (a few hours later), and it takes a little more time. After a few days of sleep, it takes a little bit longer to wake up as it essentially restores from hibernation. It is far quicker than notebooks, but isn't the instantaneous wake-up that iPads have.
Battery life is also different and highly unpredictable. Depending upon the apps you have installed on a Surface, there could be significant battery drain even when asleep. I can put my iPad to sleep and when I wake it 8 hours later, the battery drain is about 1-2% (if that). On the Surface (and again, any Windows tablet) the drain I've experienced was about 1-2% PER HOUR (sometimes more).
In every day use, again based on personal usage patterns, battery life on the Surface is not comparable to the iPad.
All that is from a hardware perspective, software is another topic.