A lawsuit will result in the "discovery" process, and very well might show that Apple had wanted to do this thing for a very long time and at some point they realized that a 3rd party had just introduced something similar to what they wanted to do. And people inside Apple proposed buying the company to save time and money. But when he said no, Apple just decided to continue on their plan.

Or the discovery may uncover evidence of poor behavior. You just don't know.

Seriously folks, consumer devices are being used internally for a long time before they become known to the public. UI improvement ideas are being thrown around constantly and are logged, discussed, prioritized, etc. Just because something isn't there on launch day, or v2, v3 or v4 of the software, doesn't mean they didn't think of it or didn't plan to do it.