the vertical thing can/is a measure of inefficiency to a degree. but this can also be a factor in injuries (higher vertical O = more impact) so that is relevant to many
tomtom - yes they have much potential and presumably the resources to put behind it. let's see. I like their cardio runner BTW, no idea how much it sells but I would have thought it does well. I guess satnav on phones is a big downer for traditional tomtom so they have to go in a different direction ... running (where they will encounter running apps on phones !!)
interesting thought. i'd not considered where garmin were going with running watches. guess I've not seen anything that makes me think they are going in the direction you favour. s'pose they would argue (with hi end watches) that they are going for more technique/physiology type things firstbeat/dyamics rather than convenience/comfort type things like tomtom/Epson/mio.
yes I have a mio. I like it. quite a few serious athletes will be using HRM for R-R beat analysis/HRV. eg the v800 does this. the mio is EKG compliant not sure if as accurate as a polar H7 tho.
garmin must want to go further with their tie in with firstbeat and they need R-R for that. so I think straps are here to stay. also their new hrm4 (on the 620) must surely be the most obvious first integration choice for the dynamics stuff.
yes the Epson looks good. i'm meant to be being sent one...still waiting
as I say I reckon they will go the burst route a-la-Ambit3. ok for women and ok in a wetsuit but .....
I saw some of the teaser pages on the garmin site about the 920XT before they were removed. didn't give too much away other than the price and colour. someone claims to have seen one in Kansas whose wearer said it had inbuilt hrm. which would be optical I guess. my garmin contact told me a while back that garmin don't like optical. so it still might use a strap but which uses their Dynastream burst technology (as licenced to Ambit3)