As a fellow end-user of X1C3, we believe that you would enjoy your X1C3!
We have two (2) units of X1C3 (X1 Generation 3, circa 2015), and from our anecdotal observations both units had almost the same battery life among them:
Unit #1) X1C3(i7): i7-5500U, QHD (2560x1440) matt non-touch IPS, 8GB RAM, 512 GB SSD, Windows 8 Pro 64bit
Unit #2) X1C3(i5): i5-5300U, FHD (1920x1080) matt non-touch IPS, 8GB RAM, 256 GB SSD, Windows 10 Pro 64bit
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Answers as below:
1) Yes, we also chose Thinkpads for its TrackPoint!
***As daily intensive end-users of both X1C3(i7) and X1C3(i5), we can report that there is very little anecdotal difference between these 2 machines. Specifically, both are very similar in battery life, despite the i7/i5 and QHD/FHD differences.
As such, may we suggest that:
~If plan to use X1C3 outdoors, may we suggest X1C3(i7) with QHD, especially since you've stated your primary purpose is to decode streaming videos which is CPU intensive.
~If plan to use X1C3 indoors, may we suggest X1C3(i5) with FHD; our own X1C3(i5) had extensively played movie files from SSD satisfactorily!
2) LCD Screens for X1C3:
2a) For X1C3, all touch screens are glossy screens, which in our humble opinion is very distracting.
Also, for touch screens the LCD cover is slightly thicker/heavier, and uses slightly more battery power.
2b) Therefore we chose matt screens. All matt screens are non-touch.
Both our QHD and FHD had "perfect" screens upon arrival.
No spots or uneven LCD lighting.
2c) The QHD (2560x1440) is IPS, which is a slightly brighter LCD (from memory it was 280 NITS, but need to check).
Basically if you plan to use your X1C3 outdoors, the brighter QHD is definitely helpful, from personal experience.
2d) Our FHD (1920x1080) is IPS, which is a slightly dimmer LCD (our internet research said was 243 NITS).
2e) 3rd LCD option for X1C3: cheaper option of non-IPS FHD LCD, but we don't have that.
Be very careful when buying X1C3 for FHD; the IPS FHD vs non-IPS FHD price difference is substantial.
3) As to your question of viewing streaming 1080p videos, it would be perfectly OK to buy a FHD (1920x1080) IPS screen. Again, if you feel there is a chance of viewing outdoors, then by all means get the QHD (2560x1440) IPS screen, if budget allows.
An interesting point: my personal daily work LCD screen resolution is 1920x1080, on my QHD (2560x1440) IPS screen.
In short, we bought this X1C3(i7) with QHD for its BRIGHTER LCD screen, as we anticipated occasional outdoor use.
4) Both X1C3(i7) and X1C3(i5) ran at about the same temperature; both machines felt comfortably "warm" on your laps during battery use. Both machines never felt overly hot on our laps.
5) X1C3 is fully Windows 10 compatible; we have successfully upgraded to Windows 10 Pro for our X1C3(i7) machine!
6) Finally, here are a few good critical reviews of X1C3:http://www.notebookcheck.net/Lenovo-Thi ... 033.0.htmlhttp://www.laptopmag.com/reviews/laptop ... arbon-2015
7) As an aside, my personal machine is now a X1C4 (X1 Generation 4, circa 2016), because X1C4 offered 16 GB RAM and 1 TB storage.
The X1C3 maxes out at 8 GB RAM and 512 GB storage.
***Should you have further questions, do feel free to post again!