Do you have any experience with PDAs? PocketPCs in particular?
That would give you an idea of what to expect as to responsiveness of the touchscreen, the quality of the LCD screen, and battery life.
Exactly what to expect in terms of software performance is something we'll know shortly (once the IQ ships) but there is some reason to be hopeful: the Pocketbook core reader software is known to run *very* well on 400 MHz ARM CPUs so the extra boost to 533 MHz can't hurt.
A further clue is that Android as an environment has been described as Java on Linux but the Pocketbook Apps on the eink readers run on the core Linux OS; if the same is true of the IQ the native Pocketbook apps should run just fine.
The Android apps, being compiled Java...
Well, Java is known for code portability, not extreme performance, and the Android devices that shine by their performance tend to run on the newest 1GHz CPUs, so...
(shrug)
It's up to you to weigh the virtues of the eInk platform (paperlike display, extreme battery life, low weight) vs the virtues of LCD (backlighting, color, video capability) and their corresponding weaknesses.
In many ways, the two are going to be complementary.
(Which is where my interest comes in.)