So traktor has its various decks that can be used (Remix, Sampler, Player) I was thinking that Serato could eventually move to a modular system like that where decks could be swapped in and out.

The way you could select the decks mid performance is have a built in crate labeled "Decks" and select the desired deck with your browser controls. Then when you press the track load button, instead of loading the song it would swap that deck's "device" out for the new one.

Some possible devices/deck types could be:
1. Player (Current Deck Used in Serato)

2. Loop Recorder - allows the user to record the audio output from selected decks and loop it and append the loop with additional audio.

3. Instrument Deck - allows the user to host a VST (I realize this is a bit of a pipe dream) and play it like an instrument.

4. Step Sequencer - allows the user to load a couple of samples into a step sequencer and then program a pattern to loop.

The great thing about Serato design is that the controls that are common to almost all Serato controllers can be premapped to the deck controls. And some come quite naturally such as the looping section of the controller being able to control the looping controls of the looper deck. Plus being done natively in Serato the various decks can be synced to a tempo when necessary.

These are just some ideas and they don't all have to be implemented at the same time or for free (Gladly pay an expansion for these) but I think they would be really cool and take Serato to the next level. +1 if you'd like to see these.