Well apart from the DDJ SX not much new was seen and nothing revolutionary in the past 6 months. So my guess is, that it is slowing down. I also think that while I like the idea of iPad DJing, it is not quite there yet…
I do not feel that it is necessary to know about turntables today. The upkeep of turntables is considerable and you need to factor that in. You will need control vinyls and work with software anyways or you will need to buy every song on vinyl…
Then you will need needles and if you start out you will destroy some of them. The turntable itself will need upkeep and care unless you dig in and buy some Technics that can withstand beatings better. You will need decent sets of slipmats,… the list goes on. I sure know why I sold my turntables and only kept the oldest Technics as a display model for my home 😉