ko

New DivX Hook-Up with Matroska to Provide Enhanced Video Experience

Just little clarification. Matroska started 2002-12-06 (www.matroska.org/news/...) not in February of 2006. By *that* time they had 3 M downloads. By now I suppose it's a bit more...
Also, older computers can well support mkv. As it is a container format and not a payload format it should not produce too much overhead. The problem is that mkv is usually used together with the x264 codec for HD content, which of course will bring down a mid-range processor from say 2 years ago.

As for Sony, don't count on mkv support soon. Maybe indirectly when they will support divx 7. But as you say - that may take a while to come out itself.