Yep, but keep in mind the 8100 is 3 years old and the pearl 2 devices just launched end of last year. The year time for replacement isnt necessarily a rule. I think RIM is looking to expand its current offerings (more choices - more customers will want different styles - more sales) instead of replacing models. Keep in mind beginning of next year (probably not the end of this, but its possible) there will be an iDEN berry coming out to round out everything.

iDEN
CDMA 1x, EvDO
CDMA/GSM 1x, EvDO, HSDPA/UMTS, GSM
GSM
Touchscreen
PTT
3G/2G
Full QWERTY
Suretype
WiFi
GPS

and a slew of other features that are common to many. Obviously many of these features are common between various models, but some are different than others.