I have a Kindle Fire. I usually play movies on my laptop in my sewing room. When my laptop bit the dust, I thought maybe a Kindle fire would work but the screen is only 7 inches. Great for portability, not great for movies. Yes, I love my Kindle Fire but never use it to watch TV/Movies. And I've found that most craft books are not available in Ebook form. We ended up purchasing a new laptop so I can multitask on it.
I don't know about the Nook, but we have a wireless router and my Kindle just connects wirelessly to the internet, with no issues. But it doesn't have a separate keyboard, so I don't like to use it extensively for web browsing, definitely not for email /writing. I would vote for the TV.