http://www.xperiablog.net/2012/10/14/benchmark-confirms-1080p-display-for-sony-c660x-yuga/
1080p 5" screen, S4 Pro (quad core), LTE and I have heard that it has a mega battery (2500-2800mAh) and 32GB plus microSD slot.
Releases in Europe and Japan in Q1, US date and networks not set, but I have heard AT&T and VZW are very interested. There is also a 6" phablet planned for Q2 (1080p, same internal as Yuga) and a Q4 5" flagship with an as yet unset SoC (ST-E L9600 is what I have heard, but it is still early days) is also in the works, again 1080p 5" almost no bezel.
The 1080p screens are from JDI, not Sharp so the quality is unknown right now as they haven't been previewed yet by any news outlets but I have been told that they boast massive native contrast ratios and very decent colour reproduction.
And finally, Sony are about to release their first set of Jelly Bean updates for the Xperia T/TX, S and Acro S. My best estimate is 10-15 days from now. Also, the Xperia TL will be out in around two weeks and the update should roll out very quickly (within days of release as it is undergoing final testing right now).
I have no ETA on the V, it was mid November for UK and Japan, but since then it has changed (possibly brought forward).