1. Bright living room
Favor a brighter UST paired with a UST-compatible ALR screen. Epson's LS800 is notable for a 4,000-lumen white-brightness ISO rating, while Hisense rates the PX3-PRO up to 3,000 ANSI lumens. Those standards differ, so treat the numbers as screening criteria, not a direct lab ranking.
2. Movie-first room
Contrast behavior, HDR handling and screen quality become more important in darker rooms. Newer models such as Formovie Theater Premium and NexiGo Aurora Pro MKII support Dolby Vision and broader HDR-format combinations.
3. Gaming room
Look for HDMI 2.1 features, low-latency modes and supported input refresh rates. The PX3-PRO and Aurora Pro MKII are much newer gaming platforms than the Polaris.
4. Value-led large screen
A discounted Polaris can still make sense if you use an external streaming device and accept the older interface. Spend the saved budget where it is visible: the UST screen, room light control and audio.
Bomaker Polaris 4K UST
4K ultra-short-throw projector with an RGB laser light engine and a reported 2,500 ANSI-lumen brightness rating. Check the merchant for current price, stock and shipping terms.
Do not buy a projector only from a brightness number. Screen gain, ambient light, image size, calibration and measurement standard all affect the viewing result.