Outputting 1x3 Video Wall at 5760x1080
Depending on which kind of animation you want to run, the "simplest" solution would be to build a Linux or Windows PC with 3 graphics cards and hook these up though 3 HDMI cables and then anything that runs on that PC can be shown on the 5760x1080 video wall...

As the TVs are 4K-ready, the above solution would also work for a 11520×2160 video wall.

If you need something small (a laptop would be too small), you can go for the MicroATX form factor with 2 Graphics cards for 2 screens and the on-board Intel graphics for the 3rd, but depending on the kind of animation that could limit you to maximum 5760x1080.