Well, since you just got your device yesterday I'll give you a chance to discover the shortcomings or any features you wish were there. The decision to root comes down to what do you hope to gain from rooting. There are no stock answers that apply to everyone.
I used to do things on my phone that I do on my NOOKcolor now. On my phone I use WiFi all the time anyway, so now I use the unrooted NOOKcolor as a replacement for everything excepts calls.
zartemis is correct about losing the "read in store" feature. People have been confusing that with not being able to access wifi in the store and gain internet access. The only thing affected is being able to read a book for an hour. Of course if that's valuable to you, you may not want to root ever.