I have a personal interest in Myanmar that goes back a while now, and this is such fantastic news. The major political transition has been pretty damn peaceful, and, while the govt has been friendly towards China, I know many people in the country would much rather pivot towards relations with the US and the rest of the western world. They still have many hurdles to overcome, but things are slowly looking brighter for the the people and the new democratic government of Myanmar. I would say just go now before the tourism industry really digs in, but, after the recent earthquake, and considering the shoddy reconstruction of many of the temples, I'd give it a little while. However, cannot recommend a general trip to Myanmar highly enough for many other reasons :)