We are of the belief that Oracle Application Express (Apex) has unlimited capability.
It has now achieved maturity, sustained growth and continues exceptional momentum. Mission critical success stories abound (including our own).
Because it's a free component in the database, it has ironically, been overlooked in the past. That is changing (because it's free, the sales force out there has had little interest in it's promotion. Oracle's own commitment however has continued to strengthen).
What it can do is eliminate architecture expense better than any other technology we know of. In nearly all implementations, it eliminates the middle tier completely. Significant hardware, license, development, administration costs are gone.
For any system that was created more than a few years ago and needs a web-based migration, this simplified approach is easily up to the task and the savings can be immense.