Laptops are notorious for their pale displays. The more colors that can be displayed at a particular resolution, the more video RAM is required. Ideally an image should display the same on a screen no matter what viewing software is used. Different degrees of compression can be used, and the higher the compression ratio gets, the more information is lost. Of course, this is a mute point if the end user does not know to expect JPEG compression and does not have the requisite software.
Thumbnails also complicate the situation.
It also loads faster, which is important for a thumbnail. Mixing images of differing bit-depths is problematic. Not only do these questions have importance for authenticity, but they may also have impact on display anomalies. Developments and Solutions Basically it all comes down to file size. In the short term there will be little improvement in modem transmission rates due to the inherent limits in telephone lines.