Even though Baroque seems to dominate the churches in Upper Austria, I also noticed many other styles and examples. Some churches are still in the Gothic style, as for example the church in Gampern (built 1497-1507). Other churches break with old traditions and decorations and present a modern interior, such as the pilgrimage church Maria Schmolln with its altar from 1992/1993. The church itself is much older (from around 1880) and used to be decorated in a more traditional style: http://de.wikipedia.org/wiki/Maria_Schmolln#mediaviewer/Datei:Maria_Schmolln_vor_1962.jpg
The newer style is a change after all the Baroque and Gothic interiors I have seen but does not make the same strong impression.