You're welcome. Well, you have 4K resolution TV, so you can. But quality might not be the best (probably laggy and Picture Quality not as good as a 4K monitor with higher/denser pixel per inch). You could try to (after you get the GTX 1080Ti since you'll be buying a 4K monitor next summer anyway as you mentioned) and it's very subjective to tell if you would be satisfied or not gaming on a 4K TV.
Note that most, if not all TV's have no Display Port input ports, so, check the GTX 1080Ti for the output ports (HDMI for the 4K TV), though some have used a DP-to-HDMI adapter and can output 4K@60Hz on their TV's just fine. Check your TV if the HDMI version is 2.0 (lower versions would not support true 60Hz, only 30Hz).