I specifically asked Nick Adams about this at the LA show, and was told several things:
1) the transmission has closer gear ratios than are available on the US-version Celicas- Lotus will be using the european gearbox that is not otherwise available here (I did not ask about specific ratios, but I assume the euro spec close ratio specs are published somewhere, and I was lead to believe they are using it as is)
2) the rev limiter will be set up to allow 8500 rpm for a few seconds to facilitate gear changes, making it easier to stay on the second cam. (I have seen 8350 rpm quoted from earlier interviews, and that is not what I was told at the show)
3) the tachometer will have a graduated range so that the display of 0-3000 rpm is compressed, and the range above that is expanded, making it easier to quickly identify the RPM during the more useful part of the range. (The show cars did not have the production tach)
4) there will be an LED at the top of the tachometer to indicate the optimal shift point based on throttle position, RPM (and load?) At part throttle, it will suggest shifting earlier, and at full throttle, will illuminate at redline. The show cars did not have an indicated redline on the gauges, and it was not clear to me what the redline indication would be on the production gauges.
Hope that helps!
-Knute