I believe that SSD will become popular in the coming years and HDD will be replaced by some new tech. eventually. But how long? Between T400s and T410, it depends what your main purpose for it. Business, gaming? Also, do you travel a lot and you will need it all the time? T400s is now at good price (especially the HDD model) as the new model (T410s) has been just released.
Thanks for the advice! Actually, I carry my laptop to the office daily...so you know the purpose is mainly for business, of course, for entertainment too, but just movie no gaming at all (I am not a game person).
Yes, I agree it's a good time to get a T400S. As for T410, the reason it's still on the list is because the HDD which is easier for upgrade. I believe SSD will be more stable and mature to expand the application to all laptop someday, but like you said "how long?".
Anyway, for business would you think T400S is a better choice than T410?