Netflix: Watch Instantly: "Mac
An Intel-based Mac with OS 10.4.8 or later
Safari 3 or higher; or Firefox 2 or higher
1 GB RAM"
Mom's still running a G5 iMac - the original 17" model. She's also a big fan of Netflix. Hmm. New mac? Or Rokku netflix box for streaming over the TV? (and wifi network and receiver and speakers for switching between cable, DVD and Netflix and . . .)