<apex:pageBlockSection title="Results" collapsible="false">
            <apex:pageBlockTable value="{!queryResultsList}" var="prod2">
                <apex:repeat value="{!fieldAPINames}" var="fieldAPIName">
                    <apex:column value="{!prod2.[fieldAPIName]}"/>
                </apex:repeat>
                <!--
                <apex:column value="{!prod2.Name}"/>
                <apex:column value="{!prod2.Description}"/>
                <apex:column value="{!prod2.IsActive}"/>
                <apex:column value="{!prod2.ProductCode}"/>
                <apex:column value="{!prod2.Family}"/>
                -->
            </apex:pageBlockTable>
        </apex:pageBlockSection>

public class ProductCatalogPageController {
    public List<Product2> queryResultsList{get;set;}
    public String query{get;set;}
    public String strOfStuff{get;set;}
    public Map<String, Schema.SObjectField> fieldAPINames{get;set;}

    public PageReference testAction(){
        String SobjectApiName = 'Product2';

        Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe();
        Map<String, Schema.SObjectField> fieldMap = schemaMap.get(SobjectApiName).getDescribe().fields.getMap();

        String csvFields = '';
        for(String fieldName : fieldMap.keySet()){
            if(csvFields == null || csvFields == ''){
                csvFields = fieldName;
            }else{
                csvFields = csvFields + ', ' + fieldName;
            }
        }
        query = 'select ' + csvFields + ' from ' + SobjectApiName;
        queryResultsList = Database.query(query);

        strOfStuff = 'Stuff goes here';

        return null;
    }
}