Integrated charging sounds interested, but too much weight for batteries, and potential fire hazards.

Removable wheels are nice, when you need to upgrade the wheels or clean. Otherwise their weight is almost negligible.

None of the options are too appealing. GPS would be nice, but most road warriors are not checking a bag, and I am pretty sure GPS is banned.

Most lightweight material is nice, until it fails.

The ability to leave my clothes wrinkle free, cram in just a bit more and good protection and easy access to devices/papers on the front is what I am interested in.