You can configure PowerPoint 2010 to print your presentation Slides in High Quality resolution. This can be very useful if you have high quality images in your Slides and want to prepare a printed copy of your presentation with the same level of quality.
To configure powerpoint 2010 to print in High Quality you need to enter powerpoint Options from File menu, and then look for the Advanced tab. Now, look for High Quality checkbox under Print section and check it.
This setting can also be useful if you plan to print your Slides as Adobe PDF and keep the high quality resolution, however make sure to check the PDF settings as well at the time you print the presentation.