Lisa Gade of MobileTechReview has just published an excellent video walkthrough confirming that the very stylish HP Spectre X360 ships with a Synaptics digitizer and supports the HP Active Pen (sold separately).
The 13.3-inch convertible laptop starts as low as $899 for an Intel Core i5-5200U with 4 GB of RAM and 128 GB storage and tops out at $1370 for a Core i7-5500U with 8 GB of RAM and 512 GB SSD. All the models feature Intel HD Graphics 5500.
From the looks of Lisa's demo, Synaptics has come a long way in the last year. The biggest drawback for most will be the lack of Wintab drivers for older software.