Good points!

Like @paul klipp, I have mostly quit using slides for my talks, using either whiteboard, or just the web browser if I need to show something. I must admit there have been times where a slide deck probably would make the talk better. But for most parts, it has helped me from spending time moving pixels, to, as you point out, focus on the storytelling. And has reduced those seven minutes, to five.

I've written about it here, (it's perhaps a bit didactic): https://medium.com/netlife/sliding-into-the-void-e3557ba87da6

Going Keynoteless is certainly a good exercise once in a while.