As of right now the new ring enchants seem to be 23 spell power each. That is a total of 46 damage that only enchanters can have. At this time it appears that enchanters will also be able to make BoP wands, though the ones in the beta thus far appear to be place holders.
More info here:
Enchanting - WotlkWiki - Wrath of the Lich King Information
Both the current plus healing and spell damage enchants are converted to spellpower in the beta. Testers report that while the spell damage to weapon is still 40 spellpower the 81 healing is 43 spellpower because of the way things converted.
For me the expense and time invested in leveling enchanting is more than enough reason to keep it in Wrath of the Lich King. The wands and ring enchants will be a nice added benefit, and the ability to use scrolls to enchant alts gear is something I think is long over due and rather exciting.