At Dayton, I had a chance to ask Kenwood reps about the TS-990S.  They did have a few details, but many (such as price) are still rather vague. I made notes on these:

• This rig will weigh in at 57 or so pounds. This is probably due to the fact that it has an internal power supply.
• The main receiver is completely down-conversion.
• The sub receiver is the TS-590’s receiver. They even told me that if you read the TS-590S spec, it will be identical to that of the TS-990S sub receiver. As with the TS-590, the TS-990S sub receiver is mainly down-conversion.
• It has three, 32Bit DSP processors
• It has five roofing filters at: 300Hz, 500Hz, 2.7 6kHz and 15kHz which  run at 8MHz. The sub-receiver runs at 11MHz.
• Connections include:
• Optical In/Out
• DVI
• and “Multiple” USB connections
• The TS-990S will be 200 Watts
• Shipping: They expect to ship in November 2012
• Price: Between $5-10K US, but will not exceed $10K US. Two different Kenwood reps told me that Kenwood understands that there aren’t many hams in this economy who could spend in excess of $10K.

These specs were rattled off as if they’d been said a thousand times (and I bet they had by the time I got around to the booth).

Not a lot to go one, but I can vouch that these features and specifications came directly from Kenwood.