I would be really curious to see if hyper threading is actually beneficial for TW3. I'd really like to know if that is the case because it's not very common for games i suppose. Would be a very interesting piece of info from CDPR.
As for the CPU speed i think having a 1-2 year old i5 or i7 would be quite enough. I don't think (or i don't want to think) that with a CPU like that anyone would have problems running the game unless hyper threading actually makes a difference.
I can't remember exactly but in some interview CDPR mentioned that their engine is already taking advantage of quad core processors and the article was old, so i'd be surprised if they are not taking benefit of HT by now. Dragon Age Inquisition is the best example in recent games that took good benefit of HT and why Frostbite is regarded as one of the best engines, I think REDEngine will follow the same path, it should because the game has much higher demand of A.I calculation and other stuff than DAI.
http://www.dsogaming.com/pc-performance-analyses/dragon-age-inquisition-pc-performance-analysis/
That said I also think that any Sandy, Ivy or Haswell i5s will work just fine, they have great performance per core. I highly doubt that the game alone will be able to bottleneck CPU (like Assassins Creed Unity), the bottle necking is more dependent on how much fps you want from your graphic card, for example I almost bottleneck my overclocked i5 4690k when I play DAI over 120 fps, the utilization reaches around 85% - 95% on all cores but if I lock the fps to 60 then the utilization drops down to 60%.
.. I hate you guys
Your words got into me. Iam surprising myself looking into ( small? ) desktop ( screen+mouse+keyboard and stuff ). Comparing what I could get with my price range. Especially since I realized 980 and 980m are not the same thing ( you said noob? ). Anyways. You guys for making me wonder if a ( tower? ) desktop could fit in a big suitcase
Edit : I know it doesn't exist. Just want you to know that you made me doubt.
Lol. Well if you're making this decision then it's good, I know that a PC doesn't give you the portability but power/performance wise it's always better than a laptop specially when gaming is your primary activity and you don't have to worry about heat issues that much. It also gives you ability to play with overclocking, lots of benefits but sacrifice of portability.
both 970M and 980M are not equivalent to their desktop brothers, you can see full specifications here.
http://www.geforce.com/hardware/notebook-gpus/geforce-gtx-980m/specifications
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-980/specifications
The most noticeable differences are
1. Less CUDA cores (due to 4 deactivated SMMs)
2. Significantly less memory bandwidth (due to less speed).
It's the same GM204 chip used in desktop GTX 980 but with compromises here and there to reduce power consumption and heat output.