I'm starting to agree with you, though my reasons may be more diversified:
1) Motion lost their "lock in" with me when they changed all the peripherals (docking station, keyboard, etc.) for the new model. I'm going to lose my investment in those things next upgrade I do anyway so why not consider another brand.
2) Motion seems to be focusing on vertical markets such as medical at the exclusion of others. I personally think they are missing the boat by not paying attention to business execs. I know of at least 3 that have adopted Motion since I started using mine, 2 more seriously considering, and they can afford whatever they want. However, I see no indication that Motion is paying any attention to this market segment. Some TPC manufacturer ought to latch onto this lucrative opportunity.
3) I prefer the slate form factor since I don't use the keyboard away from my desk except occasionally on travel and at home. However, the hard top keyboard for the M1400 leaves a lot to be desired when I do need one. With brands like Lenovo offering convertibles with better keyboards and comparable size and weight to the slate alone (at least once I stick it in my executive portfolio), why not have my cake and eat it too?
4) Although my experience with Motion suppport has not been terrible, it is certainly inconvenient at best. Since my M1400 is my only computer for everything I do I can't stand to give it up. Sure I have other desktops around at work and home but it's a tremendous pain to transfer stuff back and forth, not to mention giving up all the benefits of a tablet. I currently have the "dancing cursor" problem but I just go get a cup of coffee when it happens (soon after start up), and give it a chance to die down, because I'm not willing to lose it for a week or more even if they fix it for free.
If some manufacturer really wanted to lock in the top (most expensive) end of the market they would offer a free replacement while you send yours in to be fixed. Take out your harddrive, plug it into the replacement they send, and keep on working while yours is in the shop. That's something I'd pay extra for!
So I'm going to be looking at other brands when the next generation tablets come out with the dual processors (hopefully soon!). It's got to be 12", light weight, thin and with great battery life and good screen and a good keyboard solution of some sort. Reliability and service (as documented in these forums) will be high on my decision check list.
Hopefully Motion monitors this forum and can decide if these things are worth it to keep their current customers.