This is better progress than I was aware of. I last searched on this years ago, 8 to 10 years probably, and they were talking about electro magnets then. These guys are using air pressure to do the work:

http://jalopnik.com/what-its-like-to-ride-in-a-car-with-the-camless-engine-1529865968

Being developed by Koenigsegg and crew, at least this one is. I can only imagine the engines are non-interference.

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Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K