Wales have limited devolution, not any kind of independence. They have a greater deal of autonomy on some issues than they did before. It's the same with NI and Scotland, we have devolved assemblies.
The difference with Scotland is that they've shown how many believe they are a viable independent country. So many of the Scots voted for independence that the nationalists now have a lot more political clout in Westminster, if projected SNP wins are to believed. I do think they will do very well in the upcoming elections and I look very much to it.