Is the Core Ultra 7 255U fast enough for everyday work?

Yes. Twelve cores and a 5.2 GHz turbo handle office apps, browsers with many tabs and light photo editing comfortably. Heavy 3D rendering and gaming are not its strength.

Is the screen good for outdoor use?

It is anti-glare, which helps, but 300 nits is modest. In direct sunlight you will likely need shade or higher brightness.

Can I use it for photo or video editing?

Light editing is fine, but 62.5% sRGB coverage means colors will look less accurate than on a wide-gamut display. Color-critical work is better on a higher-gamut panel.

Does it support AI features?

It is classed as an AI PC with an Intel NPU, so it can run local AI-assisted features in supported apps. Performance depends on the app and how much memory the configuration has.

Is the touchscreen worth it on a 16-inch laptop?

It helps with presentations, scrolling and quick taps, and the 16:10 shape gives more vertical space. If you never touch the screen, a non-touch panel would be lighter and cheaper.