I think it will look fine on a projector. However, if it does not read it correctly, you will need to change the display settings on your MBP to a lesser resolution.
I think it will look fine on a projector. However, if it does not read it correctly, you will need to change the display settings on your MBP to a lesser resolution.
More specifically, to a 4:3 aspect ratio setting, which will make things look stretched on your MBP screen.
However, when you have your MBP connected to a second display, as long as it's spanned (and not mirrored), PP will show the slides on the 2nd display and will give you a dashboard (slides, notes, etc.) display on your MBP screen, so, as long as the 2nd display is 4:3 (most projectors are), you'll be fine!