How many TiVo's do you currently have? The package change is completely separate to any voluntary choice to convert your TV software, however...
In TiVo-land, all your boxes (whether TiVo or V6) are fully functional with hard drives. TiVo's cannot be converted into 360 and need a hardware swapout. V6 can be software-converted.
The difference is, that in 360-land, additional multiroom installations are mini-boxes without hard drives. Existing V6 can be converted and will retain storage, but any additional boxes (which include TiVo > 360 swaps) will be minis and you don't get additional storage.
So if you have 1 x TiVo, you'll get a 360-master. If you have any additional TiVo, they become 360-minis and you will only retain one master.
I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more
Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks