IBM Notes 10.0 introduces a new look for the tried and true Notes workspace. The trouble is, it is just change for change’s sake. In fact, it reduces the efficiency of using the workspace because it increases the space between tiles (so there are fewer shown on the same size screen).
In short: I hate it.
My Preference: Use the notes.ini setting V10Workspace=0 to revert to the Notes 9 workspace style.