3D Charts will be a nice addition to the WinForms suite

http://www.telerik.com/help/wpf/common-export-support.html

Resolution: 
Add an option to export the chart to an image or a stream using the ExportToImage methods.

Add vertical cursors for Line series that stay in place unless the user drags them. Each cursor should select the data points that covers. The cursor should allow setting its position programmatically.

Currently values can only increase from left to right and from bottom to top.

RadChartView should visualize the pan and zoom state of a view through a scroll bar

http://www.telerik.com/help/winforms/chart-features-marked-zones.html

IMPROVE. RadChartView - one should be able to access the tooltip instance in order to customize it (change font, delay, etc)

Add print functionality

One should be able to add annotations at certain positions within RadChartView.

When setting the border color of the axis the labels are showing a border with the same color. The color is inherited from the axis element. One should be able to easily disable this, or it should not happen.

How to reproduce: 
public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    LineSeries lineSeries;

    public RadForm1()
    {
        InitializeComponent();

        this.lineSeries = new LineSeries();

        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(20, "Jan"));
        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(22, "Apr"));
        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(25, "Jul"));
        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(19, "Oct"));

        this.radChartView1.Series.Add(this.lineSeries);

        this.lineSeries.HorizontalAxis.BorderColor = Color.Green;
        this.lineSeries.VerticalAxis.BorderColor = Color.Blue;
    }
}

Workaround: iterate each of the axis labels and set their border color to Transparent
public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    LineSeries lineSeries;

    public RadForm1()
    {
        InitializeComponent();

        this.lineSeries = new LineSeries();

        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(20, "Jan"));
        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(22, "Apr"));
        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(25, "Jul"));
        this.lineSeries.DataPoints.Add(new CategoricalDataPoint(19, "Oct"));

        this.radChartView1.Series.Add(this.lineSeries);

        this.lineSeries.HorizontalAxis.BorderColor = Color.Green;
        this.lineSeries.VerticalAxis.BorderColor = Color.Blue;
    }

    protected override void OnShown(EventArgs e)
    {
        base.OnShown(e);

        foreach (var item in this.lineSeries.VerticalAxis.Children)
        {
            AxisLabelElement label = item as AxisLabelElement;
            if (label != null)
            {
                label.BorderColor = Color.Transparent;
            }
        }

        foreach (var item in this.lineSeries.HorizontalAxis.Children)
        {
            AxisLabelElement label = item as AxisLabelElement;
            if (label != null)
            {
                label.BorderColor = Color.Transparent;
            }
        }
    }
}

This problem is related to different serie types are added to the chartview

The new functionality should allow a display similar to the one in the WPF pie series:
http://docs.telerik.com/devtools/wpf/controls/radchartview/features/labels/smart-labels#using-smart-labels-in-radpiechart

ChartLegendElement is not able to wrap the LegendItems

Add RightToLeft support in DrillDownNavigator.

The Line Series cannot be clicked/selected and cannot be used in DrillDown scenarios.

Add Scatter area series support for RadChartView.

Currently only axes labels can be rotated. There should be a way to rotate series labels as well.

Resolution:

Set the LabelRotationAngle property of the series to preferred angle. 

We should add a way for users to bind a property in the data source that will be used as a legend title for pie data points.

Resolution: 

Set the LegendTitleMember property to bind legend title of PieSeries. 

Introduce mechanism that will allow the vertical axis to appear at a certain position regardless of the size of its labels. For reference see Stock Series \ Indicators example.