Bug 308577 e4 applications don't get focus
Upon startup, e4 based applications (including the 4.0 SDK) don't receive focus. Bogdan mentioned that this has to do something with the splash screen.
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/WBWRenderer.java
private class WindowSizeUpdateJob implements Runnable {
		public List<MWindow> windowsToUpdate = new ArrayList<MWindow>();
		public void run() {
			clearSizeUpdate();
			while (!windowsToUpdate.isEmpty()) {
				MWindow window = windowsToUpdate.remove(0);
				Shell shell = (Shell) window.getWidget();
				if (shell == null || shell.isDisposed())
					continue;
				shell.setBounds(window.getX(), window.getY(),
						window.getWidth(), window.getHeight());
			}
		}
	}
	WindowSizeUpdateJob boundsJob;
	void clearSizeUpdate() {
		boundsJob = null;
	}
	boolean ignoreSizeChanges = false;
	@Inject
	Logger logger;
	@Inject
	private IEventBroker eventBroker;
	private EventHandler shellUpdater;
	private EventHandler visibilityHandler;