The Windows SDK and JRE will only be made available externally as part of a IBM Product package (such as, but not limited to, WebSphere Application Server (or similar IBM product) or the IBM Eclipse SDK) Therefore SDK on Windows is not available in this Beta.
As to your second question I'll find out and clarify.
That is strange. Oracle already merged java and javafx and according to their roadmap: http://www.oracle.com/technetwork/java/javafx/overview/roadmap-1446331.html javafx will be fully integrated with java 8. Since Swing is a dead project it looks like IBM Java can't be a replacement of Oracle Java on workstations, am I right ?