A bit of misinformation here. The Continental planes are used on overseas service for the most part. You may get one on a flight connecting through the Newark hub and on to an overseas destination. Delta has individual video in all overseas Business Elite class service on 767-300ER's and 777-200 planes. Delta is currently redo-ing planes with this service with new seat covers and padding (no changes to seat size and hard points of the seats) and new digital entertainment systems for BE (individual choice) and coach (fixed choice like old Song planes and can buy movies) and once the existing fleet is done over will re-do the 767-400ER's followed by the 767-400 and 767-300 planes. The non-Song 757's will receive re-do's sometime in the mix, but they have not publicly announced that schedule nor have they scheduled any Song planes for their first class changeover. The last few 767-200's will be gone by the end of the summer (not last December as originally announced). By 2008, Delta mainline will fly only five main plane types - MD88/90, 737-800, 757-200, 767-300/300ER/400/400ER, and 777-200. Not in the public purvey yet through press releases, but hidden in legal filings and pilot contracts is a future purchase strategy that slots new 100-120 seat jets (Embraier or similar) and 787 Dreamliner domestic and long range type planes into the mix.
No matter how you look at it, Delta and most other carriers are putting lots of technology into the planes as they buy or refurbish them as a driver of higher fares. Long haul planes will get systems first, but it won't take long for smaller planes to follow suit. The new Embraier 170/190 planes have systems in AC and JB trim right now.