I agree with the "work case" approach.... I commute to work. I have a backpack with my laptop. Wearing the backpack makes my back sore sometimes and I'd rather not wear it. Strapping the backpack down to the bike is time consuming and I'm always reaching back to make sure it is still there.
I'm always surprised when I look at all the "bag" options for motorcycles, yet nobody had developed a quick attach/release platform for something that looks like a backpack.. which people walk around with everyday. Not a brief case, not luggage, not a helmet holder, just a dang backpack.
I want to drop the backpack on the platform, click it in, and I'm on my way. (little straps, hooks, or bungies are not good enough)
If I were smart, I would invent it and make millions