One thing Google didn't show us when Ice Cream Sandwich was announced in October was Android 4.0 running on a tablet. NVDIA's taken care of that for us and is doing so on the ASUS Transformer Prime, one of the more compelling Android tablets we've seen thus far.
While you're certainly not going to get all the nuance of a quad-core Tegra 3 tablet's graphics watching it on video like this, it's worth pointing out that NVIDIA recorded this video just two days after Google released the Ice Cream Sandwpreviewed ich source code. (And Riptide looks as good as ever.) Point is, we very much want some Tegra 3 action (and will get it in the next few weeks with the Transformer Prime), and we very much want some ICS on our exisitng tablets.