Are all the dvds from 4 on gonna be in widescreen only?

Yes, Season 4 onwards was recorded in widescreen so it will be released as such. Both of the TVs in my house are widescreen and the episodes look great! On Paramount Comedy the episodes of ELR are cropped to fullscreen despite them originally being widescreen. That puts me off watching them on TV, so I stick to the DVDs now.