When displaying content in a lower resolution, such as 1920x1080, on a higher-resolution monitor, like a 3440x1440 monitor, there is a possibility that the content may appear slightly blurry or less sharp compared to native content at the monitor's native resolution.

This blurriness can occur because the monitor has to upscale the lower-resolution content to fit its higher pixel density. The upscaling process involves stretching the lower-resolution image across the monitor's larger number of pixels, which can result in some loss of clarity and detail. The extent of blurriness will depend on the specific scaling algorithm used by the monitor and the quality of its implementation.

However, it's worth noting that the blurriness may not be very noticeable unless you examine the content closely or have a particularly discerning eye. Many monitors today have advanced upscaling algorithms that can mitigate the blurriness to some extent, providing a relatively clear and acceptable viewing experience when displaying lower-resolution content.

If you primarily plan to use the monitor for gaming or other tasks that require high visual fidelity, it is generally recommended to use content at the monitor's native resolution whenever possible to achieve the best image quality.