just to give you some backround when shopping for notebooks...
this 15.6" notebook is what you would consider the mainstream budget offering by Dell. Prices between $400-600 are considered budget line notebooks.
It's normal for budget notebooks to have 1366x768 Resolution (720p) NT screen not a 1920 x 1080 Resolution (1080p)
If 1080p is important for your streaming shows, i'd suggest looking into the midrange notebooks at $600 and higher. Of course along with the upgrade in 1080p screen, those notebooks would likely be touch capable, 2x faster Intel i5 chip, etc. those notebooks will can run multiple 1080p windows.
Yes. There is Bluetooth with this laptop. The Bluetooth is part of the WiFi/Bluetooth mini-card inside the laptop. I already used my Plantronics Voyager Legend Bluetooth Headset with Skype on this laptop. Bluetooth on this laptop works with both Microsoft Windows and Linux. I tested the Bluetooth on this laptop out on the pre-installed Microsoft Windows 8.1 and Kubuntu 13.10 (I installed) with Bluetooth Headset and Bluetooth Speakers. PS - When someone says "probably" or "probably not" that is really saying that they don't know.
Yes. It has a built-in WiFi. And you can use an USB WiFi adapter too.
I don't know any consumer computer sold today that is not compatible with WiFi, either with built-in WiFi or USB WiFi adapter. This includes "smartphones" and tablets.
So no matter what computer you get it will be WiFi compatible one way or another.
Yes, I currently use photoshop, illustrator and Dreamweaver on it and it runs them just fine, however if you want an even smoother experience on it, it is best to upgrade the RAM to 8gb, which I would highly recommend. The computer also has windows 7 installed.