This would. If IFR, you could pick up a clearance on the ground, but it would be a bit more work on ATC’s end, as they would just be submitting the plan to the FSS anyway, so you could just file it directly with the FSS, and ATC would pick up the plan either way. You’d be eliminating a step by talking directly to the FSS. Or better than that, they have this prior to you even stepping into the plane:
FOR FP FILING CALL CXO FSS 1-800-833-5602.
So if IFR, give them a call, and you’re good.
Now, if VFR, you could just depart on your own, and pick up VFR w/flight following in the air, and be good. As you know, they’ll assign a discrete code and identify you, then you’re on your way.
I agree, getting things set up while still on the ground saves you from having to loiter under the Class B airspace while the controller talks to two other airplanes then ask you to repeat your request etc.
I think most tower controlled airports are happy to get you into the system while taxiing as well, they know how busy things can get once you get into the air.