Handsets that will not get ICS are:
- Xperia PLAY SO-01D
- Xperia ray SO-03C
- Xperia acro SO-02C
- Xperia arc SO-01C
- Disney Mobile on docomo F-08D
- Disney Mobile on docomo P-05D
- GALAXY Note SC-05D
I hadn't noticed before, but the original "18" handsets was actually only 17 because the Acro was listed twice - once as being confirmed for upgrade, and once as being only considered for upgrade.
Docomo cites the lack of memory in these handsets as the reason for not upgrading to ICS.
From what I can tell, each of these has 512 MB of RAM, which is certainly enough to run ICS. The Nexus S was officially updated and only has 512 MB. Perhaps this is not enough to run ICS when bloated with all the Docomo crap?
I've been critical of the Xperia line in the past. Working with the X10 is frustrating. The phone was brought to market in a beta state, and, even though it had the same hardware as the Google Nexus One, it was, comparably, a pig.
While I want to support domestic makers, until they begin reliably providing "after service," which I define to include upgrades, I find it difficult to recommend them. Since HTC hasn't been so successful in Japan, right now it seems that Samsung is the brand to recommend.