Charts from numbers not dynamically updating in Pages/Keynote
Not yet. You can provide feedback to Apple here:


https://www.apple.com/feedback/numbers.html


However, a month after this question was asked, Sal Soghoian - then the Product Manager for Automation Technologies at Apple got on stage to demonstrate how to automate placement of a numbers chart inside a keynote presentation. This should be easy to automate following the video and slides.


https://developer.apple.com/wwdc15/306