It's not a matter of 'longer term', it's a matter of suitability of the HW for the task at hand. The iPod touch / iPhone has small screen, which would not allow

It's not a matter of 'longer term', it's a matter of suitability of the HW for the task at hand. The iPod touch / iPhone has small screen, which would not allow the book to be displayed in full glory along side the video, so no reading along for the child :(. Plus it doesn't support Flash, it would need to be a native app, hence taxable by Apple. I'm not saying iPhone wont work at all, I'm saying there's probably an additional opportunity (maybe better) for a bigger device, designed specifically for the task, and sold at a healthy margin (people who go on lots of business trips normally have above average income).