BenQ TH575i
A bright, gaming friendly 1080p projector for living rooms, with Google TV in the box. A good pick if you can live with replacing a lamp.
Amazon $649$649
The BenQ TH575i rates 4.6 among 1080p and under projectors; the Nebula X1S rates 4.6 among 4K ones. The BenQ TH575i costs $2,150 less ($649 vs $2,799).
Nebula X1S
#5 in 4KFull review
A very bright, easy to set up 4K laser projector with built-in Netflix for living rooms that cannot be fully darkened.
Amazon $2,799$2,799
Prices were last checked October 29, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (1080p and under and 4K), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | BenQ TH575i | Nebula X1S |
|---|---|---|
| Overall rating | 4.6/5 | 4.6/5 |
| Brightness 25% | 100 3,800 ANSI lumens | 100 6,000 ANSI lumens |
| Value 15% | 98 $0.17 per lumen | 90 $0.47 per lumen |
| Resolution 10% | 100 1920 x 1080 native | 100 4K (pixel shift) |
| Streaming 15% | 100 Google TV with licensed Netflix | 100 Google TV with licensed Netflix |
| Setup 10% | 50 Auto keystone, 1.1x zoom | 80 Autofocus, auto keystone, 1.7x zoom |
| Light life 10% | 69 15,000 hour lamp | 100 30,000 hour RGB laser |
| Gaming 10% | 79 16.7 ms input lag | 50 input lag not published (neutral score used) |
| Warranty 5% | 100 3-year warranty | 50 2-year warranty |
Independent measurements
BenQ TH575i
No independent test published yet.
Nebula X1S
| Tested by | Brightness | Input lag | Contrast | Conditions |
|---|---|---|---|---|
| ProjectorReviews | 5,886 lm | 19 ms | 5,000:1 | Conference mode 5,886 lm; Standard 2,922; NebulaMaster 2,748. Lag about 19 ms at 4K/60 in Game mode. Native contrast about 5,000:1 with iris at minimum. |
Specifications
| BenQ TH575i | Nebula X1S | |
|---|---|---|
| Picture | ||
| Brightness | 3,800 ANSI | 6,000 ANSI |
| Native resolution | 1920 x 1080 (1080p) | 1920 x 1080 (1080p) |
| Picture resolution | 1080p | 4K (pixel shift from 1920x1080) |
| Display | DLP | DLP |
| Light source | lamp | RGB laser |
| Light source life | 15,000 hours | 30,000 hours |
| HDR | - | Dolby Vision |
| Color gamut | 88% Rec.709 | 106% Rec.2020 |
| Native contrast | 15,000:1 | 5,000:1 |
| Dynamic contrast | - | 56,000:1 |
| Placement | ||
| Throw | Standard throw (1.5:1) | Standard throw (0.9:1) |
| Largest image | 300 in | 300 in |
| Autofocus | No | Yes |
| Auto keystone | Yes | Yes |
| Obstacle avoidance | No | Yes |
| Auto screen fit | No | Yes |
| Optical zoom | 1.1x | 1.7x |
| Streaming and gaming | ||
| Built-in apps | Google TV, licensed Netflix | Google TV, licensed Netflix |
| Input lag | 16.7 ms | - |
| Top refresh rate | 120 Hz | 60 Hz |
| HDMI ports | 1 | 2 |
| eARC | No | Yes |
| Speakers | 10 W | 40 W |
| Build | ||
| Battery | None | None |
| Fan noise | 34 dB | 28 dB |
| Power | 295 W | 240 W |
| Dimensions | 11.7 x 9.3 x 4.7 in | 7.3 x 11.1 x 9.7 in |
| Weight | 5.1 lb | 13.7 lb |
| Warranty | 3 years | 2 years |
| Released | 2026-07 | 2026-08-26 |