This is what would like life both easy and hard at the airport; obviously, the easy bit is because of the miles that you have to walk with your luggage.

The downside is what would the security at the airport make of it?

Features – When you encounter declines, the motors disengage, allowing you to control the unit like traditional rolling luggage. The handle and suitcase are designed so that 85% of the carried weight is transferred to the wheels, reducing your load and enhancing manoeuvrability as you navigate terminals. The suitcase is made from injection moulded ABS/polycarbonate composite–the same material used in automobile bumpers–that provides superior impact protection, and both halves are conjoined with steel hinges that are riveted to the case. There must be at least 15-lbs. in the suitcase for the power assistance to operate; holds up to 70 1/2 lbs. The integrated battery lasts up to 2 1/4 hours (or 1 3/4 miles) after a full charge and recharges via AC (adapter included) in five hours. 32 1/4″ H x 19 2/3″ W x 13 1/2″ D. (23 lbs.) Priced at $1,300.00

Source [Hammacher Schlemmer]