@sujoyp,
I agree that (well, at least for me), the icons/layouts seem dull. I was just citing one of the reasons Nokia says it wants to stick to it. (Also, considering the anemic CPU-GPU's their predecessors spotted, it might be justified.)
Maybe, even now,(Nokia N8) with its reasonably powerful GPU, a more 3-D centric attractive UI, unless properly coded to use GPU, might have performed slow. Also, considering that there are lots of lower-end phones which may sport even more pitiful CPU-GPU combo, may not have been able to keep up with it.
Overall, a fast and snappy UI, should be preferred over a great-looking,but extremely slow one. So, if that indeed were the case, Nokia's decision makes sense.
I too think that at 24k, and with further price reductions after, it'll have really good sales ,at least in India. (where there still are lots of users who prefer only Nokia phones).
But, at Rs 28k (its rumoured price now), it might be a tough sell to some.