Hello,
similarly to many other users, we think to have quite good hardware and GPU, but resources are never enough when managing dense point clouds or classes in aerial mapping.
From other software, we find extremely useful to implement an "Edit Circle" (with radius user selected), that can be moved by double clicking on the cloud. For moving, i would suggest to use Arrows or WASD, like suggested by another user previously.
When "Edit Circle funtion" is ENABLED, only points inside the circle are shown and can be edited, that makes editing fast, easy, reliable and, what is more important, quick even with a laptop.
I am sure this implementation would be extremely appreciated, because sometimes (even with our Dual Xeon and Dual ATI GPU configuration), the dense point clould cannot be managed because computer hangs and even deleting a few points becomes a 15 minutes operation.
Regards
I