Mark Brunstad announced the upgrade path from VCDX4 to VCDX5 yesterday on the communities.

Quote:

Following the release of the VCAP5-DCD Beta exam results, the VMware Certification Team is pleased to announce the upgrade path from VCDX4 to VCDX5.

Current VCDX4 holders in good standing will be able to upgrade their certification to VCDX5 by successfully passing the VMware Certified Advanced Professional 5- Datacenter Design (VDCD510) exam. The VCAP5-DCD exam release date will be announced in May. Release of the VCAP5-DCD final exam blueprint will occur at that time.

All VCDX4-holders wishing to upgrade will be required to achieve VCP5. There will be a three-month window following the VCAP5-DCD exam release during which the VCP5 certification requirement will be satisfied upon successful completion of the VCAP5-DCD exam. After the three-month window expires, all VCDX4-holders will be required to satisfy published training and examination requirements for VCP5 prior to completing their upgrade via the VCAP5-DCD exam.

VCDX4-holders in good standing who have completed the VCAP5-DCD Beta Exam and achieved a passing score have satisfied the requirements for VCDX5 and are thus certified.

So basically if you are a VCDX4 now and you want to become a VCDX5 all you need to do is pass VCP5 and VCAP5-DCD.

This also means that there are some people out there who already are VCDX5. Congratulations to all!