70% of publishers having Natal games is encouraging, but until we know more it is hardly exciting ...
Until I get more information I would assume most of the games will be ports, clones, sequels or spin-offs of the games these publishers have produced for the Wii; with similar effort put into their Natal efforts as was put into their Wii efforts. In a handful of cases these games might be worth picking up if you have already committed to buying Natal, but in most cases the games should be avoided regardless. Now I could be wrong and these publishers who insist upon only producing low-budget Wii Games regardless of how well it sells (or how much software it sells) may decide to put a reasonable effort into Natal in spite of it having a userbase of 0 and the development costs associated with a reasonable effort on the XBox 360 being dramatically higher than what it would be on the Wii.