Jim is looking for a large digital picture frame, perhaps something as big as 27". Leo suggests Big eFrame, but Jim thinks those are too bright and and won’t change pictures longer than once every 30 seconds. Leo says the larger digital picture frames are expensive, and he might be better off buying an HDTV. These days, TVs have USB and other card slots, and can do slide shows.
Another option is a 27" monitor with a netbook plugged into it running a power point presentation. Computer monitors are far higher resolution than TVs, too. He could also look into a Roku box or an Apple TV for more options.