It will depend on the suppliers of the panels. Right now both 15" and 17" panels are facing shortage. However, 17" panels have better profit margin. Suppliers would rather sell 17" than 15". This should lead 17" to be mainstream somewhere middle 2004.
The DVI is another story. To be compatible with exist PCs, monitor suppliers still use D-Sub and major signals source. My personal guess would be early 2005.