As a heads up, the new launcher can cause lag whenever you play multiplayer. This is a big issue for us as our massive redstone machines can decrease fps dramatically. If you do have a dedicated graphics card, go to the GPU's settings and put in javaw.exe to the list to run the dedicated card as opposed to the integrated graphics. There is one bad side to doing this: Whenever you run, or a program runs javaw.exe, it will ALWAYS use the dedicated card which will drain batteries on laptops. I hope this "heads-up" was useful for you. Have fun building!
-onlybob