I love Ink and Switch's old Embark prototype.

The key insight: a document is a great medium for collecting unstructured data.

Imbuing a document with even small amounts of mechanistic magic can make the experience feel radically more productive.

Instead of applying heavy-weight software, the content in your document just magically comes alive and more functional as you use it.

It shows the power of a coactive medium for getting things done.

Imagine what you could do with that kind of power not just for travel use cases!