I would be good to have a Canvas Projection with Adobe Lightroom on iPad, like Photoshop when editing and viewing images. I feel this feature would be useful for editing, giving a large viewfinder when editing images. The feature works really well in Photoshop and I feel would work well with Lightroom too.
I would be valuable to have, especially with some displays that are colour accurate, which will help to ensure colours are correct, but also to preview on a larger screen how adjustments are affecting the image. To add, this could also help to create more space on the iPad screen itself for more tools to be visible.