personally i think that layouts shouls arrive in 2 flavours and then DX or classic.
the 1024 resolution option is excellent for laptops and the 1280 resolution is perfect for todays flatscreen/widescreen monitors. should a layout be 1600, make all the cabinet and irellivant bit over the 1280 mark.
Ive seen some fantastic releases with great DX detail, greatly let down by way to much attention to the bloody cabinet - resulting with text (usually the ??? bonus area) with bonuses achieved that are way to small.
Its a question of personal taste by the layout creator really, but having cabinet and coinslot area (some even the payout tray) make the details much smaller in order to fit the machine in.
2p`s worth finished