Floppies have almost vanished now and flash drives have become bread and butter. However CDs and DVDs are ubiquitous and cheaper than flash drives. Most of our back up data or music or games and software is on CDs. The ones you burn yourself, you hardly ever bother to label them properly. The best you do is put a black marker over it. And even that is not descriptive enough.

If we could somehow have our mobile phones display title and file names of files saved on CDs that would save people like me from going through the cruel ritual or changing two dozen CDs each time we want to search for some file. I suppose you could use some technology similar to laser pointer inside a mobile phone whereby the laser is shone onto to a CD surface and an application on the mobile screen displays the title and names of files contained on the CD. That is one application of laser pointer technology within mobiles. You could also then use your mobile as a laser pointer in your presentations. I will leave it to you to decide which one is more important.