If by DVDs, you mean Blu-ray or HD DVD discs? Sure. DVDs will likely never have lossless audio (they don't have the room.)
Manufacturers are always trying to come up with features to entice you to "upgrade" your gear. DVD/Dolby Digital was a big leap forward, IMHO. A practical no-brainer.
High definition disc players are not a revolution in quality, unlike HD broadcast or cable which is an impressive improvement in quality. You may be able to hear the difference in audio, or see the difference in video. With a large display, you SHOULD see the difference in video. Audio is more subtle.