backdate this a bit. Yes it can, if you're a trackpad guy. But do check out the Passport as well!
Backdate this as well. Q20 should be out before END of this year. It is launched simulatenously with BES12.
Before end of this year. Nov launch if on time. Together with the BES 12 services
Right now I think they are set with 2.5k battery. The specs they are testing come in 3 variants, and 3 sizes.

1) same as Q10 (everything)
2) extended form factor, upgraded battery to 2.5k mAH
3) take everything inside a Z30, and put into Q20 (now the latest test model is this)

They were doing testing with 3 batteries, 1.5kmAH, 2550 and the 3xxx battery. (I think around 3100, that's Passport's battery)
We won't know what's the end result, but its safe to say its no more blueprint, and now they're on hardware testing and finalizing details.
Don't think so. If you're talking Dual core  Snapdragon 600 1.7GHz with Adreno 320 (Quad core Adreno 320, same as the one in Z30) then you're looking at some extremely overpowered GPU for the screensize. That is assuming they're settling for the Z30 spec on the phone.

added to 1st post! 
yup, trackpad fan here 
yea.. just the battery upgraded and processor? was hoping for better camera actually

if the rumors are true, it'll be 3.5inch, q10 was 3.1inch