Next iPad to get significant battery life. [Speculation]

I'm not a prophet and i'm not saying anything concrete, just a thought that came to me.

Remember how the iPad was so great with it's 10 hour "all day battery life" in 2010? It could be used for more time away from a power station, while the macbook was more reliant in a power source.

Well, this year's macbook air have a staggering 12 hour battery life. More battery life than an iPad.

I don't believe that Apple will make the next iPad with the "still great" battery life. They could design the A7X SOC with more power efficiency, for an extended battery life.

If they made this battery bump, my guess is 16 hour battery life. 13 hour would still be good, and is more realistic.

What do you guys think?