Looks like S4U 16K preorder is up

【京东】https://3.cn/29-XUdC1「爱乐酷光固化3D打印机 土星4 Ultra 16K LCD大尺寸全自动调平桌面家用高速3d打印机 【新品上市 升级大尺寸】土星4U 16K」 点击链接直接打开

It does seems like it has heater build in, but i am not sure anyone would upgrade