Depends on how you want to use / what tools you have.
If you have bunch of cordless stuff (drill, impact, screwdriver, sawzall, light, etc) then it would be nice to have them each in their own slot and battery chargers plugged in - - keep on floor and roll around to where needed. Conversely, you could take off wheels and attach to wall and make it a wall cabinet with power.
If you have bunch of air tools that you use, then it could store grinder, cutoff wheel, ratchets, etc (ie electric part of cart not used).
Either way, a small toolbox could go on top and get wheeled around to where needed in garage.