It will really depend on how fast the war is won.
*1914/1915 - Germany takes Paris quickly and can shift her armies East to defeat Russia almost as fast. Germany will want a Western border along the Meuse if not the whole of Belgium and possibly the whole of Lorraine. Possibly a satellite kingdom/duchy out of Franche-Comte. In the East Poland, the Baltic States, Finland, and Ukraine become German satellites but otherwise Russia is largely left alone. Ironically the leftovers of Russia become more stable and homogenous, but are strapped for resources. Siberia is developed industrially and becomes the focus for the new Russia.
-Technology focuses more less on synthetics but more on aircraft, automobiles/fast transport, and possibly metallurgy. Rockets will be avoided almost outright, electronics and aircraft will have a 10-15 years less development, and tanks might be only a dream for a while. Naval forces stay with battleships. Overall radios will develop but there will be less recognisable tech and the US will be an industrial powerhouse but not nearly so prosperous. There is no boom in the late 20s but no bust either. Overall the 20th century will take a *Very* different direction and there will likely be another war in a generation with technology we would recognize as early 1930s because the war is much less devastating and the dream of "a just war" still floats in people's heads.
*CP victory in 1916/early 1917: Germany will lose some of her colonies but probably realize that European territory has its perks too. She can use third parties to trade and work to develop rubber, gasoline, and other products on her own. Russia will still suffer as above but the West will probably be either status quo antebellum or with a few changes. Perhaps Lorraine goes to Germany, perhaps Belgium becomes a German protectorate, perhaps the French pay indemnities, but not all of the above.
-Technology will focus on synthetics as the Haber process was about the only reason Germany could fight the war for so long. Science and material processing will predominate, aircraft and tanks will be developed. Rockets are a novelty that could be used to hit London and thus they recieve attention. The MP18 will be in its prototype stages soon and likely small arms will see further developments. Emigration will not be as severe and there will still be a chance of another war in a generation but the horrors of the Western Front will be fresh for some people. Overall technology will not change too much by then but there will be more people and the potential for a more devastating war. France likely goes fascist and might be the "bad guy" for the next war
*CP victory in late 1917/1918: "victor's justice" with a Treaty of Paris or Treaty of Versailles that will either se no gains or lots of them. Germany will want the Meuse in the West, rip the Russians apart, and probably let Austria quietly disintegrate but in a way that favors Germany. Austria is likely dead either way but the prospect of a GrossDeutchLand with most of modern Germany, Belgium, Luxembourg, Austria, Czechloslovakia, and Poland in it makes for one powerful state. Italy loses the Trentino, which will join Germany, and Venice might become a free city. Ottomans get much less than they expect and become a new Italy that falls to fascism in the late 20s. Russia goes Soviet but the Civil War takes down the Communists as Germany steps in and restores the Romanovs as puppets.
-Technology will focus on automation, synthetic chemistry, aircraft, automobiles/tanks, and self-sufficiency. Investment will increase as the shortages will create deep scars, they will want to avoid any of those in the future should there be another war. Fuel efficiency might also be another area of interest as might shipbuilding/submarine technology. Considering that the Germans used subs from the end of World War I to restart their sub research 15 years later, we might see Elektricboots in 1930s if the research continues unabated. Small arms will see development and perhaps if Belgium is in German hands they get the FN developer who builds the FN 1949 and later FN FAL. Rockets will get attention because of their long-distance potential while agricultural technology will see development, perhaps earlier hydroponics or improved mechanization, so more labor could be freed.