Hi. I'm Ergin. I am a part time artist who works in both digital and traditional media. I had my first solo digital art show this past year and plan on another one in 2017/18.
I hate being tethered to a desktop and have never wanted a Cintiq. I bought one about 2 years ago and immediately returned it, returned to my Intuos Pro for working on my MAC.
Now that I've moved up to my Apple Pro (12") and pencil, I love working in apps on iPad. But they only go so far, even the great ones. For me, nothing beats Corel Painter and it's ever improving brush media. I just finished up a piece that uses the new "Audio Expressions" attributes.
I've gotta say that as much as I love iPad, Procreate and others .. IPad is just not ready to handle Painter 2016.
I also use Photoshop and third party tools like Topaz and/or On1 for finishing.
Your UI looks really clean and elegant, critical for even the larger iPad Pro. I'm looking forward to making it work. I hope you have or have planned a way to "swap" to different sets to keep up with when I change up the tools I use (e.g., Photoshop hotkeys are different from Painter hotkeys).
I have really high hopes that Astropad will give me that portable and natural interaction that I love so much in traditional media. With cellular speeds improving and the new updates coming in MAC/Apple devices interaction, I'm hoping that even a wifi won't be needed. But for now, tethering with a lightening cable is so much better than prior options.