You bring up a very good question. You can now get an iPad Pro with up to 1 TB of storage, and with a soft keyboard and a pencil, the iPad Pro seems to be positioned as an alternative if not replacement for the traditional laptops.
I’ve been cultivating a list of creative software to replace the subscription only Adobe Suite, which is how I came to find Sparkle. My other favorite new software is the Affinity Suite from Serif: Photo, Designer and Publisher, perfect alternatives to Photoshop, Illustrator and InDesign, and no subscription fees.
Currently Affinity Photo and Affinity Designer are available for the iPad and for Mac OSX. It would be terrific if Sparkle and Affinity Publisher were also to arrive on the iPad.