I think if more women were involved in deciding what products to design, what I've been looking for would already exist. I want a very small bag on wheels -- not something that looks like carry-on luggage, but a small, sleek case with a compartment for a laptop and room for one book and a few personal items. There are lots of larger cases, but they don't make them small enough, because -- I think -- men find it easy to carry a small bag (and would be embarrassed to wheel one). But, believe me, women want wheels for a simple laptop case.
And don't make it out of that coarse "technical nylon" with thick velcro-y flaps on the outside. Don't make it multicolored or shape it like a dorky backpack with those ugly padded backpack straps. Make it simple, black nylon and put two zippers on the top. Make the handle slim and the wheels small. There! It's such an obvious product! Somebody needs to start making this. Please. You'll get rich.