I, for one, am excited. I plan to purchase myself a Scaly digi set this month as a birthday present to myself. I can then convert my 2 lane 30 ft 4 by 8 apartment track to digital. That means, I'll be able to race 6 cars on my small track and everyone can participate at the same time. I'll also be able to lap dummy cars at will which will add fun to just lapping alone.
Here is how I see digital in the future:
1) There is always resistance to change whether it be autos, trains, computers, whatnot. People don't like change. I can remember a day when people said vinyl records and cassette tapes would never be replaced. They are long gone. CDs are rapidly giving way to MP3 files and players. Digital slot racing is here to stay.
2) I imagine Scaly is already working on 4 lane 12 car setups as I write this. They'd be stupid not to given the number of hardcore slot car enthusiast clubs with 4 lane tracks. Imagine a 24 hour enduro with 12 cars competing on a 4 lane with continuous running..... insane.
3) If Carrera, Ninco, SCX, and Scaley want to play with each other, they will find a way to standardize the systems and compatibility. It will happen in the next few years. Whatever set you will buy today will likely be obsolete in a few years (welcome to the computer age).
4) Once digital racing catches on, slot car racing and clubs will show considerable proliferation in the US and abroad. If I had the capability to run 12 Nascar Scaley's on a 4 lane and had a 60 ft trioval, I could book the place solid in the US for the next three years.... of course, we'd need the cars running in the proper counter clockwise direction for full effect. So give me 4 lanes, 12 cars, banked turns, CCW running, and I'll be looking to build a shop myself tomorrow.