Make a Chrome extension
I used an Android emulator to use your three pane app on my PC - and I liked it, but using an emulator to run an app is just way too unwieldy.
I do need that bigger picture outline View for planning so have switched to the Gtasks app on Chrome for that and then sync back to use Ultimate on my smartphone.
From what I've seen, however, the Ultimate app for tablet computers is superior do the Gtasks app for Chrome so you have it beat if you could port it over to Chrome. Any chance of this happening?
Rob Gordon commented
Also, this would allow offline access to your product so digital nomads would love it.