So just to sum everything up in one post, what Sony are set to launch for Q4:
LT25i - 4.3" Hayabusa mini, Krait
LT30i - 4.6" Mint, flagship device, Krait
LT29i - 4.6" Japan only, Krait
MT27i - 4.0" Xperia J, low end, Scorpion
Xperia SX - 3.7" Japan only, possible Xperia ray replacement, Krait
LT26ii - 4.3" Xperia SL, Scorpion
Xperia tablet - Tegra 3, $50 cheaper than iPad 3, no full HD screen.
Add in all of the current devices and you have one seriously confusing line up.
To me the Xperia J looks like a completely pointless device and there is no successor the Mini-Pro which was a pretty successful device. They should ****can the Xperia SL as well and just replace it outright with the Krait based LT25i. It makes no sense to have two 4.3" devices as one (Xperia SL) will have to be much cheaper than the other and Sony should be moving away from low margin devices. That's also why Xperia J is pointless, it's better to make the Xperia P more competitive which is already in the same bracket.
The tablet looks great though and I think if it had a full HD screen it could easily become the best selling non-Nexus Android tablet, especially now that app makers have started targeting Android tablets for dedicated apps so the ecosystem has begun to grow.