Youtube implemented the "deep link"-Feature which appeared in newsofthefuture in 2007. The predicted date was quite accurate (October 20th, it was introduced on October 30th) but the year was one year too early. It was introduced in 2008.
A new feature lets you search by lyrics. So you can find songs in your library by entering a part of the lyrics of that song.
Of course you can also search by lyrics in iTunes Store.
Arguments: If you hear a song on the radio, and you only catched a few lyrics of the song, you can search the Internet and maybe find some songnames. Then you have to search for these songsnames in the iTunes Store. Much more comfortable would be a direct search in the iTunes Store.
Also if you are looking for a song in your library, you sometimes don't remember the song-title but some chunks of the lyrics, therefore a integrated lyrics-search would be really helpful.
While doing some investigation on current plugins for iTunes, I found the blog-entry of Brad Lauster, which also had the same idea. He also mentions another feature:
...and think of the fun you could have if you extended this idea to Smart Playlists?
You could create a playlist that only included songs with the lyrics "big" and "butt." This playlist would, of course, include Sir Mix-A-Lot's "Baby Got Back" and Nelly's "Hot in Herre." ...just think of the possibilities!
Why it's not already done: Propably because the music-industry doesn't want to provide the lyrics and because that feature is rather nice-to-have
Questions: What other applications can you think of beside lyrics-search and smart-playlists depending on lyrics, once lyrics would be accessible through iTunes?
I found a AppleScript that searches for lyrics, but unfortunately it seems to search for the lyrics in the mp3-file and not in an online-database as I suggested here. iTunes lyric search uses online-lyrics, but seems to work only on Windows. I haven't tested this one yet.
AppleTV now provides smooth music transition. When listening to a song on your stereo, and leaving the house with your IPod, the song just played in ITunes continues on your IPod and if you come home, the song playing on your IPod continues on AppleTV.
Arguments: AppleTV and other Apple-Products will be more and more connected, because this will raise the value of the components and make way to new applications like this music transition. Moreover it will lead to a lock-in for the customer: if all the entertainment-products in the household are from Apple or compatible with Apple products, the generated value of theses communicating products will be higher, than if the products can not communicate with each other. Therefore the customer will prefer Apple-compatible products.
See also IPhone is a remote control
Questions: What other useful applications are there if you connect AppleTV, Computer, IPhone and IPod (and other devices)?
The today released software-update makes the IPhone a remote control for AppleTV and Macs. You can control Music and Videos from wherever you are in your flat.
Arguments: Using the IPhone as the central controlling device for music or movies fits perfectly in the living-room-entertainment-strategy that apple follows with Apple TV. The Difference to existing remote controls (see "Current Development") is the bigger touch-screen and therefore better interaction-possibilities. For Example you can easily scroll through your cds, what is not possible with other devices.
Moreover because the IPhone has no fixed buttons, the interface can be adapted to such new application-areas...
Questions: What other application areas can you think of? You could also control other devices in your household, for example the heating or the oven also from outside your house. Would that be reasonable or rather useless technological gimmicks?
Current Development: Patent from apple to use the IPhone as a remote control
Salling Clicker remote control of Itunes on a Nokia
Salling Clicker - Control computer-applications from your mobile phone. With this application it's possible to control ITunes like if you had it on your mobile device! For example you can also see CD-Artwork etc. directly on the mobile phone! (try it for free, you'll be impressed)