To your list I would add:
A Transmitter with excellent TX IMD performance that has no ALC overshoot issues and that produces the best possible TX IMD performance.
A radio that does not run on 13.8 volts is design progress that delivers numerous advantages.
A 200 watt radio is a must for those who dont want to run a amplifier. Its enough power when used with a decent that does not require you to turn on a heat generating and noisy amplifier.
If this radio does have a second receiver, lets hope the second receiver is a true direct sampling receiver that can work in 3 modes. 1. A second direct sampling receiver, 2. A Panadapter 3. A transmitter spectrum analyzer.
Hams have long needed a way to assess the quality of their transmitter signals. Oscilloscopes and hams friends are really the worst ways of assessing the quality of ones signal.
19 Inch rack dimensions. It would be great to mount your complete remote shack in a 19inch server cabinet. This is already the standard for networking equipment. It would also making securing the equipment against theft a
lot easier. I know of a 2 cases where thieves broke into RF installations and took everything and left everything in the racks alone, even though the racks were full of valuable test equipment! I guess it was just too hard
unscrewing it.
A detachable front panel for remote operation like the TS480. Having to buy a dummy expensive non transmitting box like Elecrafts K3-0 remote solution is a ridiculous waste of money. The TS480S is the best remote rig available with its remote panel. There is no reason why even a very large base radio could not have a proper independent remote panel secured with a few nice Hex bolts.
What would also be nice is bumper feet like that on the Agilent test equipment especially their spectrum analyzers. A snap protective cover lid if the radio has a bandscope would also be a nice feature. I have always wished that someone in the ham industry would copy the way Agilent packages their equipment.
At least this new Kenwood radio release will bring excitement to Dayton. I thought 2012 was going to be a boring year for ham equipment releases. Kenwood and Hilberlings new radios will makes this year in ham radio very exciting.
There is hope for better things, I was just about to buy another new expensive watch, I think I will delay that purchase!
Almost all HF rigs today, are design descendants or variations on the KWM-2. The classic xcvr of all time. The ergonomics and layout still work. Kenwood should stay with it. Features I 'd like to see.
1)
IP Connectivity. Built in WI-FI and ethernet.
2) Rig can be controlled with any popular
tablet or mobile device.
3) Internal recorder that will allow recording of spectrum or Audio and then
output it to a Cloud service.
4)
NO Spectrum analyzer. It costs too much to incorporate. Spend the money elsewhere to meet the marketing price point.
5) A Kenwood Web site listing 990's -- When and where they are on the air. (Operator may opt in or out)
6)
Automatic Logging of radio operations…..Data stream fed to cloud. (Public or private access)
7) Oh Yes, An
xmitter and receiver.( Just build a contemporary radio with state of the art design.) The radio section of the rig is only part of the whole.

One button
feed to Skype without a PC
9) Meter Option models (Analog or Graphic display)
10
) 100 watts only. Make the rig smaller.
.