A personal question: Should I upgrade to Windows 8?

So I was hoping to get the opinion of the Tribe and maybe some advice and info.

I have been considering upgrading to Windows 8 since I first saw it. I had a WP7 and really enjoyed it, and now have upgraded to a Lumia 920, which I absolutely love. I also have an Xbox 360, which I use fairly often (Halo, Netflix, and some music listening, right now with Last.fm). So one of the main benefits of Windows 8 to me seems to be that it would mesh really well with my phone; for example, I use Dropbox, but am considering switching to SkyDrive.

One of my main questions is about music. Xbox Music looks awesome, but I'm not sure if I want to pay that much for a music service. Right now my favorite is a mix of Pandora or other mix stations like Nokia Music, and Google Music, which I got into after I got a Nexus 7 this summer, and love. All my music stored in the cloud for free! I use the Gooroovster app on my WP8 and it works alright, but not fantastic. So, it is worth the money to consolidate all these music services into one native client? And I had also heard that Xbox Music comes free with Windows 8, but what does that include? Just streaming, or can I do the music match to access my whole Library from my phone?

The other thing that concerns me is that my current laptop is a little over 3 1/2 years old. I will probably get a new one within a year, maybe in 6 months, so is it worth it to pay $40 to upgrade? Will this add life to my current PC?

Let me know what you guys think. I'd love for some advice!