In the past, the WDW resort increases have only amounted to a few points here and there over the years. The room you got for your points was ROH - best availalble (not including Concierge). In general, people got the top view room available.
For 2002,
DVC instituted a pay as you go plan. Your amount of points will dictate the type of room and it is now possible to book Concierge rooms as well. However, the price for this was a pretty dramatic increase most times of the year for the amount of points needed.
As Rich said, the program is not guaranteed to continue...although we can reasonably expect it will. However, keep in mind that as DVC's open at hotels, those hotels become unavailable. This is the case for WL, Beach Club, BWI now that they have DVC options.
It's best to use the resorts for a "change" rather than permanent use of points.
150 points doesn't go very far in the resorts. You could get 5 weekday nights in a standard view room at the Yacht Club during January. Or, you could get just shy of 7 (weekday) nights in a one-bedroom at BCV, BWV preferred or VWL or 9 nights at OKW. Staying in a studio, including weekends, would get you almost two weeks at OKW and roughly a week and a half at the other resorts.