Uniden is really the only "game" in town--- of course, there is Whistler, but they have not come up with some of the innovations that Uniden did under the guidance of Paul Opitz with the SDS series. That is if you want a "traditional" scanner. I have several of the 100's and 200's that are being used by clients for business purposes (news gathering), and nothing compares in terms of flexibility of operation.
I don't believe that any radical changes in the internal design of the SDS since their introduction, and while many folks here have made suggestions to improve some of the unit's functions, by this time most realize that it's unlikely that anything short of a new concept is unlikely.
Of course, surprises do happen, but based on past experience, those with hopes and wishes for the current series are just "whistling in the wind".