this interview explains quite a lot about Tegra 2,
especially regarding the temperature and battery concern,
it is able to disable part of itself when under idle condition,
thus being more efficient in power consumption

there is already a phone that is almost as capable as you describe, the Motorola Atrix
Tegra 2 in itself has already a pretty powerful GPU, and 1GB of RAM built in,
except the camera which is still only 5MP

if you watch the video,
they are playing some Tegra 2 only games,
and after that they still comment on how it does not affect the temperature,
thus it shouldn't be too worrying,
though it might affect the battery life for long hour of intense usage,
let's just wait for the result then?

regarding battery life, don't know about other phone,
but the Atrix has a 1900mAh battery,
the battery life shouldn't be too bad.

1GB of RAM is already available in phones, 2GB shouldn't be too far away

lol..3k is just made up by our forumers la..no one knows the official price yet

here's another video of SGS2

1.2Ghz dual core sure don't look lousy to me =/
plus, its just leaked specs, nothing official yet, maybe wait for awhile more for the official spec before commenting on the specs.

yup, true.

Nvidia itself is claiming that there will be a new gen of Tegra processor every year
smartphone technology is evolving damn fast

its not meant to be cheap in the first place