A 32"-40" 16:9 LCD TV or large-format display would give you a potential resolution of 1440x1080 for your 4:3 area (Full resolution would be 1920x1080.)
A 32"-40" 16:9 LCD TV or large-format display rotated would give you a potential resolution of 1080x810 for your 4:3 area (Full resolution would be 1080x1920.)
A 30" 16:9 LCD monitor would give you a 4:3 resolution of 2134x1600 for your 4:3 area (Full resolution would be 2560x1600).
A 30" LCD monitor rotated would give you a resolution of 1600x1200 for your 4:3 area (Full resolution would be 1600x2540.)