April 4th is the unveiling according to
http://www.rolandconnect.com Hopefully the polyphony will be greater than 128 but I kind of doubt it. FWIW, Casio just came out with a $1,299 ($999 street) keyboard (PX-5S) with 256 note polyphony. Casio has recently produced some amazing keyboards. But I digress.
Roland is back and that's a good thing. The new BK could possibly be a TOTL offering depending on several factors. If it has top of the line sounds then they're off to a good start. But no color LCD screen(s) is a huge oversight in my opinion. It has a mic input with reverb control but there is no mention of a harmonizer. It can play .mp3 but the Yammie S-950 can play both .mp3 and .wav and the Yammie is $800 less if the price of the new BK is correct. Plus the Yammie has a harmonizer. Although the mic-preamp on the PSR-S950 is a huge disappointment if you ask me.
76 keys is a bonus but we'll have to see if it has after-touch. There are some promising signs such as real draw-bars but I'm somewhat skeptical because of the oversight and omissions e.g. no color LCD, no harmonizer?? and no sampler possibly either. The price point makes it high-end in that regard but until we know more it could end up being a mid-range board depending on the features, sounds and functions. If it turns out to be a mid-range board at a high-end price then a lot of consumers will likely pass on it. I know, I know. Don't put the cart before the horse. We'll know in a few hours what's what.
In the meantime it's kind of exhilarating to realize Roland is finally getting serious about higher-end arranger products again.
All the best, Mike